| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * 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.reactive.routing; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.Maps; |
| 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.net.intf.Interface; |
| import org.onosproject.net.intf.InterfaceService; |
| import org.onosproject.intentsync.IntentSynchronizationService; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Host; |
| 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.host.HostService; |
| 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.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * FIB component for reactive routing intents. |
| */ |
| public class ReactiveRoutingFib implements IntentRequestListener { |
| |
| 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 Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private final ApplicationId appId; |
| private final HostService hostService; |
| private final InterfaceService interfaceService; |
| private final IntentSynchronizationService intentSynchronizer; |
| |
| private final Map<IpPrefix, MultiPointToSinglePointIntent> routeIntents; |
| |
| /** |
| * Class constructor. |
| * |
| * @param appId application ID to use to generate intents |
| * @param hostService host service |
| * @param interfaceService interface service |
| * @param intentSynchronizer intent synchronization service |
| */ |
| public ReactiveRoutingFib(ApplicationId appId, HostService hostService, |
| InterfaceService interfaceService, |
| IntentSynchronizationService intentSynchronizer) { |
| this.appId = appId; |
| this.hostService = hostService; |
| this.interfaceService = interfaceService; |
| this.intentSynchronizer = intentSynchronizer; |
| |
| routeIntents = Maps.newConcurrentMap(); |
| } |
| |
| @Override |
| public void setUpConnectivityInternetToHost(IpAddress hostIpAddress) { |
| checkNotNull(hostIpAddress); |
| |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| |
| if (hostIpAddress.isIp4()) { |
| selector.matchEthType(Ethernet.TYPE_IPV4); |
| } else { |
| selector.matchEthType(Ethernet.TYPE_IPV6); |
| } |
| |
| // Match the destination IP prefix at the first hop |
| IpPrefix ipPrefix = hostIpAddress.toIpPrefix(); |
| selector.matchIPDst(ipPrefix); |
| |
| // Rewrite the destination MAC address |
| MacAddress hostMac = null; |
| ConnectPoint egressPoint = null; |
| for (Host host : hostService.getHostsByIp(hostIpAddress)) { |
| if (host.mac() != null) { |
| hostMac = host.mac(); |
| egressPoint = host.location(); |
| break; |
| } |
| } |
| if (hostMac == null) { |
| hostService.startMonitoringIp(hostIpAddress); |
| return; |
| } |
| |
| TrafficTreatment.Builder treatment = |
| DefaultTrafficTreatment.builder().setEthDst(hostMac); |
| Key key = Key.of(ipPrefix.toString(), appId); |
| int priority = ipPrefix.prefixLength() * PRIORITY_MULTIPLIER |
| + PRIORITY_OFFSET; |
| |
| Set<ConnectPoint> interfaceConnectPoints = |
| interfaceService.getInterfaces().stream() |
| .map(intf -> intf.connectPoint()).collect(Collectors.toSet()); |
| |
| if (interfaceConnectPoints.isEmpty()) { |
| log.error("The interface connect points are empty!"); |
| return; |
| } |
| |
| Set<ConnectPoint> ingressPoints = new HashSet<>(); |
| |
| for (ConnectPoint connectPoint : interfaceConnectPoints) { |
| if (!connectPoint.equals(egressPoint)) { |
| ingressPoints.add(connectPoint); |
| } |
| } |
| |
| MultiPointToSinglePointIntent intent = |
| MultiPointToSinglePointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector.build()) |
| .treatment(treatment.build()) |
| .ingressPoints(ingressPoints) |
| .egressPoint(egressPoint) |
| .priority(priority) |
| .constraints(CONSTRAINTS) |
| .build(); |
| |
| log.trace("Generates ConnectivityInternetToHost intent {}", intent); |
| submitReactiveIntent(ipPrefix, intent); |
| } |
| |
| @Override |
| public void setUpConnectivityHostToInternet(IpAddress hostIp, IpPrefix prefix, |
| IpAddress nextHopIpAddress) { |
| // 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; |
| } |
| |
| Set<Host> hosts = hostService.getHostsByIp(nextHopIpAddress); |
| if (hosts.isEmpty()) { |
| log.warn("No host found for next hop IP address"); |
| return; |
| } |
| MacAddress nextHopMacAddress = null; |
| for (Host host : hosts) { |
| nextHopMacAddress = host.mac(); |
| break; |
| } |
| |
| hosts = hostService.getHostsByIp(hostIp); |
| if (hosts.isEmpty()) { |
| log.warn("No host found for host IP address"); |
| return; |
| } |
| Host host = hosts.stream().findFirst().get(); |
| ConnectPoint ingressPoint = host.location(); |
| |
| // Generate the intent itself |
| ConnectPoint egressPort = egressInterface.connectPoint(); |
| log.debug("Generating intent for prefix {}, next hop mac {}", |
| prefix, nextHopMacAddress); |
| |
| // Match the destination IP prefix at the first hop |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| if (prefix.isIp4()) { |
| selector.matchEthType(Ethernet.TYPE_IPV4); |
| selector.matchIPDst(prefix); |
| } else { |
| selector.matchEthType(Ethernet.TYPE_IPV6); |
| selector.matchIPv6Dst(prefix); |
| } |
| |
| // Rewrite the destination MAC address |
| TrafficTreatment.Builder treatment = DefaultTrafficTreatment.builder() |
| .setEthDst(nextHopMacAddress); |
| if (!egressInterface.vlan().equals(VlanId.NONE)) { |
| treatment.setVlanId(egressInterface.vlan()); |
| // If we set VLAN ID, we have to make sure a VLAN tag exists. |
| // TODO support no VLAN -> VLAN routing |
| selector.matchVlanId(VlanId.ANY); |
| } |
| |
| int priority = prefix.prefixLength() * PRIORITY_MULTIPLIER + PRIORITY_OFFSET; |
| Key key = Key.of(prefix.toString() + "-reactive", appId); |
| MultiPointToSinglePointIntent intent = MultiPointToSinglePointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector.build()) |
| .treatment(treatment.build()) |
| .ingressPoints(Collections.singleton(ingressPoint)) |
| .egressPoint(egressPort) |
| .priority(priority) |
| .constraints(CONSTRAINTS) |
| .build(); |
| |
| submitReactiveIntent(prefix, intent); |
| } |
| |
| @Override |
| public void setUpConnectivityHostToHost(IpAddress dstIpAddress, |
| IpAddress srcIpAddress, |
| MacAddress srcMacAddress, |
| ConnectPoint srcConnectPoint) { |
| checkNotNull(dstIpAddress); |
| checkNotNull(srcIpAddress); |
| checkNotNull(srcMacAddress); |
| checkNotNull(srcConnectPoint); |
| |
| IpPrefix srcIpPrefix = srcIpAddress.toIpPrefix(); |
| IpPrefix dstIpPrefix = dstIpAddress.toIpPrefix(); |
| ConnectPoint dstConnectPoint = null; |
| MacAddress dstMacAddress = null; |
| |
| for (Host host : hostService.getHostsByIp(dstIpAddress)) { |
| if (host.mac() != null) { |
| dstMacAddress = host.mac(); |
| dstConnectPoint = host.location(); |
| break; |
| } |
| } |
| if (dstMacAddress == null) { |
| hostService.startMonitoringIp(dstIpAddress); |
| return; |
| } |
| |
| // |
| // Handle intent from source host to destination host |
| // |
| MultiPointToSinglePointIntent srcToDstIntent = |
| hostToHostIntentGenerator(dstIpAddress, dstConnectPoint, |
| dstMacAddress, srcConnectPoint); |
| submitReactiveIntent(dstIpPrefix, srcToDstIntent); |
| |
| // |
| // Handle intent from destination host to source host |
| // |
| |
| // Since we proactively handle the intent from destination host to |
| // source host, we should check whether there is an exiting intent |
| // first. |
| if (mp2pIntentExists(srcIpPrefix)) { |
| updateExistingMp2pIntent(srcIpPrefix, dstConnectPoint); |
| return; |
| } else { |
| // There is no existing intent, create a new one. |
| MultiPointToSinglePointIntent dstToSrcIntent = |
| hostToHostIntentGenerator(srcIpAddress, srcConnectPoint, |
| srcMacAddress, dstConnectPoint); |
| submitReactiveIntent(srcIpPrefix, dstToSrcIntent); |
| } |
| } |
| |
| /** |
| * Generates MultiPointToSinglePointIntent for both source host and |
| * destination host located in local SDN network. |
| * |
| * @param dstIpAddress the destination IP address |
| * @param dstConnectPoint the destination host connect point |
| * @param dstMacAddress the MAC address of destination host |
| * @param srcConnectPoint the connect point where packet-in from |
| * @return the generated MultiPointToSinglePointIntent |
| */ |
| private MultiPointToSinglePointIntent hostToHostIntentGenerator( |
| IpAddress dstIpAddress, |
| ConnectPoint dstConnectPoint, |
| MacAddress dstMacAddress, |
| ConnectPoint srcConnectPoint) { |
| checkNotNull(dstIpAddress); |
| checkNotNull(dstConnectPoint); |
| checkNotNull(dstMacAddress); |
| checkNotNull(srcConnectPoint); |
| |
| Set<ConnectPoint> ingressPoints = new HashSet<>(); |
| ingressPoints.add(srcConnectPoint); |
| IpPrefix dstIpPrefix = dstIpAddress.toIpPrefix(); |
| |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| if (dstIpAddress.isIp4()) { |
| selector.matchEthType(Ethernet.TYPE_IPV4); |
| selector.matchIPDst(dstIpPrefix); |
| } else { |
| selector.matchEthType(Ethernet.TYPE_IPV6); |
| selector.matchIPv6Dst(dstIpPrefix); |
| } |
| |
| // Rewrite the destination MAC address |
| TrafficTreatment.Builder treatment = |
| DefaultTrafficTreatment.builder().setEthDst(dstMacAddress); |
| |
| Key key = Key.of(dstIpPrefix.toString(), appId); |
| int priority = dstIpPrefix.prefixLength() * PRIORITY_MULTIPLIER |
| + PRIORITY_OFFSET; |
| MultiPointToSinglePointIntent intent = |
| MultiPointToSinglePointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector.build()) |
| .treatment(treatment.build()) |
| .ingressPoints(ingressPoints) |
| .egressPoint(dstConnectPoint) |
| .priority(priority) |
| .constraints(CONSTRAINTS) |
| .build(); |
| |
| log.trace("Generates ConnectivityHostToHost = {} ", intent); |
| return intent; |
| } |
| |
| @Override |
| public void updateExistingMp2pIntent(IpPrefix ipPrefix, |
| ConnectPoint ingressConnectPoint) { |
| checkNotNull(ipPrefix); |
| checkNotNull(ingressConnectPoint); |
| |
| MultiPointToSinglePointIntent existingIntent = |
| getExistingMp2pIntent(ipPrefix); |
| if (existingIntent != null) { |
| Set<ConnectPoint> ingressPoints = existingIntent.ingressPoints(); |
| // Add host connect point into ingressPoints of the existing intent |
| if (ingressPoints.add(ingressConnectPoint)) { |
| MultiPointToSinglePointIntent updatedMp2pIntent = |
| MultiPointToSinglePointIntent.builder() |
| .appId(appId) |
| .key(existingIntent.key()) |
| .selector(existingIntent.selector()) |
| .treatment(existingIntent.treatment()) |
| .ingressPoints(ingressPoints) |
| .egressPoint(existingIntent.egressPoint()) |
| .priority(existingIntent.priority()) |
| .constraints(CONSTRAINTS) |
| .build(); |
| |
| log.trace("Update an existing MultiPointToSinglePointIntent " |
| + "to new intent = {} ", updatedMp2pIntent); |
| submitReactiveIntent(ipPrefix, updatedMp2pIntent); |
| } |
| // If adding ingressConnectPoint to ingressPoints failed, it |
| // because between the time interval from checking existing intent |
| // to generating new intent, onos updated this intent due to other |
| // packet-in and the new intent also includes the |
| // ingressConnectPoint. This will not affect reactive routing. |
| } |
| } |
| |
| /** |
| * Submits a reactive intent to the intent synchronizer. |
| * |
| * @param ipPrefix IP prefix of the intent |
| * @param intent intent to submit |
| */ |
| void submitReactiveIntent(IpPrefix ipPrefix, MultiPointToSinglePointIntent intent) { |
| routeIntents.put(ipPrefix, intent); |
| |
| intentSynchronizer.submit(intent); |
| } |
| |
| /** |
| * Gets the existing MultiPointToSinglePointIntent from memory for a given |
| * IP prefix. |
| * |
| * @param ipPrefix the IP prefix used to find MultiPointToSinglePointIntent |
| * @return the MultiPointToSinglePointIntent if found, otherwise null |
| */ |
| private MultiPointToSinglePointIntent getExistingMp2pIntent(IpPrefix ipPrefix) { |
| checkNotNull(ipPrefix); |
| return routeIntents.get(ipPrefix); |
| } |
| |
| @Override |
| public boolean mp2pIntentExists(IpPrefix ipPrefix) { |
| checkNotNull(ipPrefix); |
| return routeIntents.get(ipPrefix) != null; |
| } |
| } |