| /* |
| * 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.segmentrouting; |
| |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.Ip4Prefix; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.MplsLabel; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.segmentrouting.grouphandler.NeighborSet; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.PortNumber; |
| 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.flow.criteria.Criteria; |
| import org.onosproject.net.flowobjective.DefaultFilteringObjective; |
| import org.onosproject.net.flowobjective.DefaultForwardingObjective; |
| import org.onosproject.net.flowobjective.FilteringObjective; |
| import org.onosproject.net.flowobjective.ForwardingObjective; |
| import org.onosproject.net.flowobjective.ForwardingObjective.Builder; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| public class RoutingRulePopulator { |
| |
| private static final Logger log = LoggerFactory |
| .getLogger(RoutingRulePopulator.class); |
| |
| private AtomicLong rulePopulationCounter; |
| private SegmentRoutingManager srManager; |
| private DeviceConfiguration config; |
| /** |
| * Creates a RoutingRulePopulator object. |
| * |
| * @param srManager segment routing manager reference |
| */ |
| public RoutingRulePopulator(SegmentRoutingManager srManager) { |
| this.srManager = srManager; |
| this.config = checkNotNull(srManager.deviceConfiguration); |
| this.rulePopulationCounter = new AtomicLong(0); |
| } |
| |
| /** |
| * Resets the population counter. |
| */ |
| public void resetCounter() { |
| rulePopulationCounter.set(0); |
| } |
| |
| /** |
| * Returns the number of rules populated. |
| * |
| * @return number of rules |
| */ |
| public long getCounter() { |
| return rulePopulationCounter.get(); |
| } |
| |
| /** |
| * Populates IP flow rules for specific hosts directly connected to the |
| * switch. |
| * |
| * @param deviceId switch ID to set the rules |
| * @param hostIp host IP address |
| * @param hostMac host MAC address |
| * @param outPort port where the host is connected |
| */ |
| public void populateIpRuleForHost(DeviceId deviceId, Ip4Address hostIp, |
| MacAddress hostMac, PortNumber outPort) { |
| TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder(); |
| TrafficTreatment.Builder tbuilder = DefaultTrafficTreatment.builder(); |
| |
| sbuilder.matchIPDst(IpPrefix.valueOf(hostIp, 32)); |
| sbuilder.matchEthType(Ethernet.TYPE_IPV4); |
| |
| tbuilder.setEthDst(hostMac) |
| .setEthSrc(config.getDeviceMac(deviceId)) |
| .setOutput(outPort); |
| |
| TrafficTreatment treatment = tbuilder.build(); |
| TrafficSelector selector = sbuilder.build(); |
| |
| ForwardingObjective.Builder fwdBuilder = DefaultForwardingObjective |
| .builder().fromApp(srManager.appId).makePermanent() |
| .withSelector(selector).withTreatment(treatment) |
| .withPriority(100).withFlag(ForwardingObjective.Flag.SPECIFIC); |
| |
| log.debug("Installing IPv4 forwarding objective " |
| + "for host {} in switch {}", hostIp, deviceId); |
| srManager.flowObjectiveService.forward(deviceId, fwdBuilder.add()); |
| rulePopulationCounter.incrementAndGet(); |
| } |
| |
| /** |
| * Populates IP flow rules for the subnets of the destination router. |
| * |
| * @param deviceId switch ID to set the rules |
| * @param subnets subnet information |
| * @param destSw destination switch ID |
| * @param nextHops next hop switch ID list |
| * @return true if all rules are set successfully, false otherwise |
| */ |
| public boolean populateIpRuleForSubnet(DeviceId deviceId, |
| List<Ip4Prefix> subnets, |
| DeviceId destSw, |
| Set<DeviceId> nextHops) { |
| |
| for (IpPrefix subnet : subnets) { |
| if (!populateIpRuleForRouter(deviceId, subnet, destSw, nextHops)) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Populates IP flow rules for the router IP address. |
| * |
| * @param deviceId device ID to set the rules |
| * @param ipPrefix the IP address of the destination router |
| * @param destSw device ID of the destination router |
| * @param nextHops next hop switch ID list |
| * @return true if all rules are set successfully, false otherwise |
| */ |
| public boolean populateIpRuleForRouter(DeviceId deviceId, |
| IpPrefix ipPrefix, DeviceId destSw, |
| Set<DeviceId> nextHops) { |
| |
| TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder(); |
| TrafficTreatment.Builder tbuilder = DefaultTrafficTreatment.builder(); |
| |
| sbuilder.matchIPDst(ipPrefix); |
| sbuilder.matchEthType(Ethernet.TYPE_IPV4); |
| |
| NeighborSet ns = null; |
| |
| // If the next hop is the same as the final destination, then MPLS label |
| // is not set. |
| if (nextHops.size() == 1 && nextHops.toArray()[0].equals(destSw)) { |
| tbuilder.decNwTtl(); |
| ns = new NeighborSet(nextHops); |
| } else { |
| tbuilder.copyTtlOut(); |
| ns = new NeighborSet(nextHops, config.getSegmentId(destSw)); |
| } |
| |
| TrafficTreatment treatment = tbuilder.build(); |
| TrafficSelector selector = sbuilder.build(); |
| |
| ForwardingObjective.Builder fwdBuilder = DefaultForwardingObjective |
| .builder() |
| .fromApp(srManager.appId) |
| .makePermanent() |
| .nextStep(srManager.getNextObjectiveId(deviceId, ns)) |
| .withTreatment(treatment) |
| .withSelector(selector) |
| .withPriority(100) |
| .withFlag(ForwardingObjective.Flag.SPECIFIC); |
| log.debug("Installing IPv4 forwarding objective " |
| + "for router IP/subnet {} in switch {}", |
| ipPrefix, |
| deviceId); |
| srManager.flowObjectiveService.forward(deviceId, fwdBuilder.add()); |
| rulePopulationCounter.incrementAndGet(); |
| |
| return true; |
| } |
| |
| /** |
| * Populates MPLS flow rules to all transit routers. |
| * |
| * @param deviceId device ID of the switch to set the rules |
| * @param destSwId destination switch device ID |
| * @param nextHops next hops switch ID list |
| * @return true if all rules are set successfully, false otherwise |
| */ |
| public boolean populateMplsRule(DeviceId deviceId, DeviceId destSwId, |
| Set<DeviceId> nextHops) { |
| |
| TrafficSelector.Builder sbuilder = DefaultTrafficSelector.builder(); |
| List<ForwardingObjective.Builder> fwdObjBuilders = new ArrayList<ForwardingObjective.Builder>(); |
| |
| // TODO Handle the case of Bos == false |
| sbuilder.matchMplsLabel(MplsLabel.mplsLabel(config.getSegmentId(destSwId))); |
| sbuilder.matchEthType(Ethernet.MPLS_UNICAST); |
| |
| // If the next hop is the destination router, do PHP |
| if (nextHops.size() == 1 && destSwId.equals(nextHops.toArray()[0])) { |
| ForwardingObjective.Builder fwdObjBosBuilder = |
| getMplsForwardingObjective(deviceId, |
| destSwId, |
| nextHops, |
| true, |
| true); |
| // TODO: Check with Sangho on why we need this |
| ForwardingObjective.Builder fwdObjNoBosBuilder = |
| getMplsForwardingObjective(deviceId, |
| destSwId, |
| nextHops, |
| true, |
| false); |
| if (fwdObjBosBuilder != null) { |
| fwdObjBuilders.add(fwdObjBosBuilder); |
| } else { |
| log.warn("Failed to set MPLS rules."); |
| return false; |
| } |
| } else { |
| ForwardingObjective.Builder fwdObjBosBuilder = |
| getMplsForwardingObjective(deviceId, |
| destSwId, |
| nextHops, |
| false, |
| true); |
| // TODO: Check with Sangho on why we need this |
| ForwardingObjective.Builder fwdObjNoBosBuilder = |
| getMplsForwardingObjective(deviceId, |
| destSwId, |
| nextHops, |
| false, |
| false); |
| if (fwdObjBosBuilder != null) { |
| fwdObjBuilders.add(fwdObjBosBuilder); |
| } else { |
| log.warn("Failed to set MPLS rules."); |
| return false; |
| } |
| } |
| |
| TrafficSelector selector = sbuilder.build(); |
| for (ForwardingObjective.Builder fwdObjBuilder : fwdObjBuilders) { |
| ((Builder) ((Builder) fwdObjBuilder.fromApp(srManager.appId) |
| .makePermanent()).withSelector(selector) |
| .withPriority(100)) |
| .withFlag(ForwardingObjective.Flag.SPECIFIC); |
| log.debug("Installing MPLS forwarding objective in switch {}", |
| deviceId); |
| srManager.flowObjectiveService.forward(deviceId, |
| fwdObjBuilder.add()); |
| rulePopulationCounter.incrementAndGet(); |
| } |
| |
| return true; |
| } |
| |
| private ForwardingObjective.Builder getMplsForwardingObjective(DeviceId deviceId, |
| DeviceId destSw, |
| Set<DeviceId> nextHops, |
| boolean phpRequired, |
| boolean isBos) { |
| |
| ForwardingObjective.Builder fwdBuilder = DefaultForwardingObjective |
| .builder().withFlag(ForwardingObjective.Flag.SPECIFIC); |
| |
| TrafficTreatment.Builder tbuilder = DefaultTrafficTreatment.builder(); |
| |
| if (phpRequired) { |
| log.debug("getMplsForwardingObjective: php required"); |
| tbuilder.copyTtlIn(); |
| if (isBos) { |
| tbuilder.popMpls(Ethernet.TYPE_IPV4).decNwTtl(); |
| } else { |
| tbuilder.popMpls(Ethernet.MPLS_UNICAST).decMplsTtl(); |
| } |
| } else { |
| log.debug("getMplsForwardingObjective: php not required"); |
| tbuilder.decMplsTtl(); |
| } |
| |
| if (!isECMPSupportedInTransitRouter() && !config.isEdgeDevice(deviceId)) { |
| Link link = selectOneLink(deviceId, nextHops); |
| DeviceId nextHop = (DeviceId) nextHops.toArray()[0]; |
| if (link == null) { |
| log.warn("No link from {} to {}", deviceId, nextHops); |
| return null; |
| } |
| tbuilder.setEthSrc(config.getDeviceMac(deviceId)) |
| .setEthDst(config.getDeviceMac(nextHop)) |
| .setOutput(link.src().port()); |
| fwdBuilder.withTreatment(tbuilder.build()); |
| } else { |
| NeighborSet ns = new NeighborSet(nextHops); |
| fwdBuilder.nextStep(srManager |
| .getNextObjectiveId(deviceId, ns)); |
| } |
| |
| return fwdBuilder; |
| } |
| |
| private boolean isECMPSupportedInTransitRouter() { |
| |
| // TODO: remove this function when objectives subsystem is supported. |
| return false; |
| } |
| |
| /** |
| * Populates VLAN flows rules. All packets are forwarded to TMAC table. |
| * |
| * @param deviceId switch ID to set the rules |
| */ |
| public void populateTableVlan(DeviceId deviceId) { |
| FilteringObjective.Builder fob = DefaultFilteringObjective.builder(); |
| fob.withKey(Criteria.matchInPort(PortNumber.ALL)) |
| .addCondition(Criteria.matchVlanId(VlanId.NONE)); |
| fob.permit().fromApp(srManager.appId); |
| log.debug("populateTableVlan: Installing filtering objective for untagged packets"); |
| srManager.flowObjectiveService.filter(deviceId, fob.add()); |
| } |
| |
| /** |
| * Populates TMAC table rules. IP packets are forwarded to IP table. MPLS |
| * packets are forwarded to MPLS table. |
| * |
| * @param deviceId switch ID to set the rules |
| */ |
| public void populateTableTMac(DeviceId deviceId) { |
| |
| FilteringObjective.Builder fob = DefaultFilteringObjective.builder(); |
| fob.withKey(Criteria.matchInPort(PortNumber.ALL)) |
| .addCondition(Criteria.matchEthDst(config |
| .getDeviceMac(deviceId))); |
| fob.permit().fromApp(srManager.appId); |
| log.debug("populateTableVlan: Installing filtering objective for router mac"); |
| srManager.flowObjectiveService.filter(deviceId, fob.add()); |
| } |
| |
| private Link selectOneLink(DeviceId srcId, Set<DeviceId> destIds) { |
| |
| Set<Link> links = srManager.linkService.getDeviceEgressLinks(srcId); |
| DeviceId destId = (DeviceId) destIds.toArray()[0]; |
| for (Link link : links) { |
| if (link.dst().deviceId().equals(destId)) { |
| return link; |
| } |
| } |
| |
| return null; |
| } |
| |
| } |