| /* |
| * 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.sdnip; |
| |
| import com.google.common.collect.ImmutableList; |
| 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.InterfaceService; |
| import org.onosproject.net.ConnectPoint; |
| 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.FibListener; |
| import org.onosproject.routing.FibUpdate; |
| import org.onosproject.routing.IntentSynchronizationService; |
| import org.onosproject.routing.RoutingService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| /** |
| * 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 RoutingService routingService; |
| |
| private final InternalFibListener fibListener = new InternalFibListener(); |
| |
| 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); |
| |
| routingService.addFibListener(fibListener); |
| routingService.start(); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| // TODO remove listener |
| routingService.stop(); |
| } |
| |
| private void update(Collection<FibUpdate> updates, Collection<FibUpdate> withdraws) { |
| int submitCount = 0, withdrawCount = 0; |
| // |
| // NOTE: Semantically, we MUST withdraw existing intents before |
| // submitting new intents. |
| // |
| synchronized (this) { |
| MultiPointToSinglePointIntent intent; |
| |
| // |
| // Prepare the Intent batch operations for the intents to withdraw |
| // |
| for (FibUpdate withdraw : withdraws) { |
| checkArgument(withdraw.type() == FibUpdate.Type.DELETE, |
| "FibUpdate with wrong type in withdraws list"); |
| |
| IpPrefix prefix = withdraw.entry().prefix(); |
| intent = routeIntents.remove(prefix); |
| if (intent == null) { |
| log.trace("SDN-IP No intent in routeIntents to delete " + |
| "for prefix: {}", prefix); |
| continue; |
| } |
| intentSynchronizer.withdraw(intent); |
| withdrawCount++; |
| } |
| |
| // |
| // Prepare the Intent batch operations for the intents to submit |
| // |
| for (FibUpdate update : updates) { |
| checkArgument(update.type() == FibUpdate.Type.UPDATE, |
| "FibUpdate with wrong type in updates list"); |
| |
| IpPrefix prefix = update.entry().prefix(); |
| intent = generateRouteIntent(prefix, update.entry().nextHopIp(), |
| update.entry().nextHopMac()); |
| |
| if (intent == null) { |
| // This preserves the old semantics - if an intent can't be |
| // generated, we don't do anything with that prefix. But |
| // perhaps we should withdraw the old intent anyway? |
| continue; |
| } |
| |
| routeIntents.put(prefix, intent); |
| intentSynchronizer.submit(intent); |
| submitCount++; |
| } |
| |
| log.debug("SDN-IP submitted {}/{}, withdrew = {}/{}", submitCount, |
| updates.size(), withdrawCount, withdraws.size()); |
| } |
| } |
| |
| /** |
| * 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; |
| } |
| |
| // Generate the intent itself |
| Set<ConnectPoint> ingressPorts = new HashSet<>(); |
| ConnectPoint egressPort = egressInterface.connectPoint(); |
| log.debug("Generating intent for prefix {}, next hop mac {}", |
| prefix, nextHopMacAddress); |
| |
| for (Interface intf : interfaceService.getInterfaces()) { |
| // TODO this should be only peering interfaces |
| if (!intf.connectPoint().equals(egressInterface.connectPoint())) { |
| ConnectPoint srcPort = intf.connectPoint(); |
| ingressPorts.add(srcPort); |
| } |
| } |
| |
| // Match the destination IP prefix at the first hop |
| TrafficSelector.Builder selector = DefaultTrafficSelector.builder(); |
| 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); |
| } |
| |
| } |
| |
| // 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(), appId); |
| return MultiPointToSinglePointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector.build()) |
| .treatment(treatment.build()) |
| .ingressPoints(ingressPorts) |
| .egressPoint(egressPort) |
| .priority(priority) |
| .constraints(CONSTRAINTS) |
| .build(); |
| } |
| |
| private class InternalFibListener implements FibListener { |
| @Override |
| public void update(Collection<FibUpdate> updates, Collection<FibUpdate> withdraws) { |
| SdnIpFib.this.update(updates, withdraws); |
| } |
| } |
| |
| } |