| /* |
| * Copyright 2014-2015 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 com.google.common.util.concurrent.ThreadFactoryBuilder; |
| 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.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.flow.criteria.Criterion; |
| import org.onosproject.net.flow.criteria.IPCriterion; |
| import org.onosproject.net.host.HostService; |
| import org.onosproject.net.intent.Constraint; |
| import org.onosproject.net.intent.Intent; |
| import org.onosproject.net.intent.IntentService; |
| import org.onosproject.net.intent.IntentState; |
| import org.onosproject.net.intent.Key; |
| import org.onosproject.net.intent.MultiPointToSinglePointIntent; |
| import org.onosproject.net.intent.PointToPointIntent; |
| import org.onosproject.net.intent.constraint.PartialFailureConstraint; |
| import org.onosproject.routing.FibListener; |
| import org.onosproject.routing.FibUpdate; |
| import org.onosproject.routing.IntentRequestListener; |
| import org.onosproject.routing.config.BgpPeer; |
| import org.onosproject.routing.config.Interface; |
| import org.onosproject.routing.config.RoutingConfigurationService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Semaphore; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Synchronizes intents between the in-memory intent store and the |
| * IntentService. |
| */ |
| public class IntentSynchronizer implements FibListener, 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 static final Logger log = |
| LoggerFactory.getLogger(IntentSynchronizer.class); |
| |
| private final ApplicationId appId; |
| private final IntentService intentService; |
| private final HostService hostService; |
| private final Map<IntentKey, PointToPointIntent> peerIntents; |
| private final Map<IpPrefix, MultiPointToSinglePointIntent> routeIntents; |
| |
| // |
| // State to deal with SDN-IP Leader election and pushing Intents |
| // |
| private final ExecutorService bgpIntentsSynchronizerExecutor; |
| private final Semaphore intentsSynchronizerSemaphore = new Semaphore(0); |
| private volatile boolean isElectedLeader = false; |
| private volatile boolean isActivatedLeader = false; |
| |
| private final RoutingConfigurationService configService; |
| |
| /** |
| * Class constructor. |
| * |
| * @param appId the Application ID |
| * @param intentService the intent service |
| * @param hostService the host service |
| * @param configService the SDN-IP configuration service |
| */ |
| IntentSynchronizer(ApplicationId appId, IntentService intentService, |
| HostService hostService, |
| RoutingConfigurationService configService) { |
| this.appId = appId; |
| this.intentService = intentService; |
| this.hostService = hostService; |
| peerIntents = new ConcurrentHashMap<>(); |
| routeIntents = new ConcurrentHashMap<>(); |
| |
| this.configService = configService; |
| |
| bgpIntentsSynchronizerExecutor = Executors.newSingleThreadExecutor( |
| new ThreadFactoryBuilder() |
| .setNameFormat("sdnip-intents-synchronizer-%d").build()); |
| } |
| |
| /** |
| * Starts the synchronizer. |
| */ |
| public void start() { |
| bgpIntentsSynchronizerExecutor.execute(new Runnable() { |
| @Override |
| public void run() { |
| doIntentSynchronizationThread(); |
| } |
| }); |
| } |
| |
| /** |
| * Stops the synchronizer. |
| */ |
| public void stop() { |
| synchronized (this) { |
| // Stop the thread(s) |
| bgpIntentsSynchronizerExecutor.shutdownNow(); |
| |
| // |
| // Withdraw all SDN-IP intents |
| // |
| if (!isElectedLeader) { |
| return; // Nothing to do: not the leader anymore |
| } |
| |
| // |
| // NOTE: We don't withdraw the intents during shutdown, because |
| // it creates flux in the data plane during switchover. |
| // |
| |
| /* |
| // |
| // Build a batch operation to withdraw all intents from this |
| // application. |
| // |
| log.debug("SDN-IP Intent Synchronizer shutdown: " + |
| "withdrawing all intents..."); |
| IntentOperations.Builder builder = IntentOperations.builder(appId); |
| for (Intent intent : intentService.getIntents()) { |
| // Skip the intents from other applications |
| if (!intent.appId().equals(appId)) { |
| continue; |
| } |
| |
| // Skip the intents that are already withdrawn |
| IntentState intentState = |
| intentService.getIntentState(intent.id()); |
| if ((intentState == null) || |
| intentState.equals(IntentState.WITHDRAWING) || |
| intentState.equals(IntentState.WITHDRAWN)) { |
| continue; |
| } |
| |
| log.trace("SDN-IP Intent Synchronizer withdrawing intent: {}", |
| intent); |
| builder.addWithdrawOperation(intent.id()); |
| } |
| IntentOperations intentOperations = builder.build(); |
| intentService.execute(intentOperations); |
| leaderChanged(false); |
| |
| peerIntents.clear(); |
| routeIntents.clear(); |
| log.debug("SDN-IP Intent Synchronizer shutdown completed"); |
| */ |
| } |
| } |
| |
| /** |
| * Signals the synchronizer that the SDN-IP leadership has changed. |
| * |
| * @param isLeader true if this instance is now the leader, otherwise false |
| */ |
| public void leaderChanged(boolean isLeader) { |
| log.debug("SDN-IP Leader changed: {}", isLeader); |
| |
| if (!isLeader) { |
| this.isElectedLeader = false; |
| this.isActivatedLeader = false; |
| return; // Nothing to do |
| } |
| this.isActivatedLeader = false; |
| this.isElectedLeader = true; |
| |
| // |
| // Tell the Intents Synchronizer thread to start the synchronization |
| // |
| intentsSynchronizerSemaphore.release(); |
| } |
| |
| /** |
| * Gets the route intents. |
| * |
| * @return the route intents |
| */ |
| public Collection<MultiPointToSinglePointIntent> getRouteIntents() { |
| List<MultiPointToSinglePointIntent> result = new LinkedList<>(); |
| |
| for (Map.Entry<IpPrefix, MultiPointToSinglePointIntent> entry : |
| routeIntents.entrySet()) { |
| result.add(entry.getValue()); |
| } |
| return result; |
| } |
| |
| /** |
| * Thread for Intent Synchronization. |
| */ |
| private void doIntentSynchronizationThread() { |
| boolean interrupted = false; |
| try { |
| while (!interrupted) { |
| try { |
| intentsSynchronizerSemaphore.acquire(); |
| // |
| // Drain all permits, because a single synchronization is |
| // sufficient. |
| // |
| intentsSynchronizerSemaphore.drainPermits(); |
| } catch (InterruptedException e) { |
| interrupted = true; |
| break; |
| } |
| synchronizeIntents(); |
| } |
| } finally { |
| if (interrupted) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| } |
| |
| /** |
| * Submits a collection of point-to-point intents. |
| * |
| * @param intents the intents to submit |
| */ |
| void submitPeerIntents(Collection<PointToPointIntent> intents) { |
| synchronized (this) { |
| // Store the intents in memory |
| for (PointToPointIntent intent : intents) { |
| peerIntents.put(new IntentKey(intent), intent); |
| } |
| |
| // Push the intents |
| if (isElectedLeader && isActivatedLeader) { |
| log.debug("SDN-IP Submitting all Peer Intents..."); |
| for (Intent intent : intents) { |
| log.trace("SDN-IP Submitting intents: {}", intent); |
| intentService.submit(intent); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Submits a MultiPointToSinglePointIntent for reactive routing. |
| * |
| * @param ipPrefix the IP prefix to match in a MultiPointToSinglePointIntent |
| * @param intent the intent to submit |
| */ |
| void submitReactiveIntent(IpPrefix ipPrefix, MultiPointToSinglePointIntent intent) { |
| synchronized (this) { |
| // Store the intent in memory |
| routeIntents.put(ipPrefix, intent); |
| |
| // Push the intent |
| if (isElectedLeader && isActivatedLeader) { |
| log.trace("SDN-IP submitting reactive routing intent: {}", intent); |
| intentService.submit(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; |
| if (configService.getBgpPeers().containsKey(nextHopIpAddress)) { |
| // Route to a peer |
| log.debug("Route to peer {}", nextHopIpAddress); |
| BgpPeer peer = |
| configService.getBgpPeers().get(nextHopIpAddress); |
| egressInterface = |
| configService.getInterface(peer.connectPoint()); |
| } else { |
| // Route to non-peer |
| log.debug("Route to non-peer {}", nextHopIpAddress); |
| egressInterface = |
| configService.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 : configService.getInterfaces()) { |
| 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); |
| 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(), appId); |
| return MultiPointToSinglePointIntent.builder() |
| .appId(appId) |
| .key(key) |
| .selector(selector.build()) |
| .treatment(treatment.build()) |
| .ingressPoints(ingressPorts) |
| .egressPoint(egressPort) |
| .priority(priority) |
| .constraints(CONSTRAINTS) |
| .build(); |
| } |
| |
| @Override |
| public void setUpConnectivityInternetToHost(IpAddress hostIpAddress) { |
| checkNotNull(hostIpAddress); |
| Set<ConnectPoint> ingressPoints = |
| configService.getBgpPeerConnectPoints(); |
| |
| 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; |
| 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 update(Collection<FibUpdate> updates, Collection<FibUpdate> withdraws) { |
| // |
| // NOTE: Semantically, we MUST withdraw existing intents before |
| // submitting new intents. |
| // |
| synchronized (this) { |
| MultiPointToSinglePointIntent intent; |
| |
| log.debug("SDN-IP submitting intents = {} withdrawing = {}", |
| updates.size(), withdraws.size()); |
| |
| // |
| // 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; |
| } |
| if (isElectedLeader && isActivatedLeader) { |
| log.trace("SDN-IP Withdrawing intent: {}", intent); |
| intentService.withdraw(intent); |
| } |
| } |
| |
| // |
| // 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; |
| } |
| |
| MultiPointToSinglePointIntent oldIntent = |
| routeIntents.put(prefix, intent); |
| if (isElectedLeader && isActivatedLeader) { |
| if (oldIntent != null) { |
| log.trace("SDN-IP Withdrawing old intent: {}", |
| oldIntent); |
| intentService.withdraw(oldIntent); |
| } |
| log.trace("SDN-IP Submitting intent: {}", intent); |
| intentService.submit(intent); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Synchronize the in-memory Intents with the Intents in the Intent |
| * framework. |
| */ |
| void synchronizeIntents() { |
| synchronized (this) { |
| |
| Map<IntentKey, Intent> localIntents = new HashMap<>(); |
| Map<IntentKey, Intent> fetchedIntents = new HashMap<>(); |
| Collection<Intent> storeInMemoryIntents = new LinkedList<>(); |
| Collection<Intent> addIntents = new LinkedList<>(); |
| Collection<Intent> deleteIntents = new LinkedList<>(); |
| |
| if (!isElectedLeader) { |
| return; // Nothing to do: not the leader anymore |
| } |
| log.debug("SDN-IP synchronizing all intents..."); |
| |
| // Prepare the local intents |
| for (Intent intent : routeIntents.values()) { |
| localIntents.put(new IntentKey(intent), intent); |
| } |
| for (Intent intent : peerIntents.values()) { |
| localIntents.put(new IntentKey(intent), intent); |
| } |
| |
| // Fetch all intents for this application |
| for (Intent intent : intentService.getIntents()) { |
| if (!intent.appId().equals(appId)) { |
| continue; |
| } |
| fetchedIntents.put(new IntentKey(intent), intent); |
| } |
| if (log.isDebugEnabled()) { |
| for (Intent intent: fetchedIntents.values()) { |
| log.trace("SDN-IP Intent Synchronizer: fetched intent: {}", |
| intent); |
| } |
| } |
| |
| computeIntentsDelta(localIntents, fetchedIntents, |
| storeInMemoryIntents, addIntents, |
| deleteIntents); |
| |
| // |
| // Perform the actions: |
| // 1. Store in memory fetched intents that are same. Can be done |
| // even if we are not the leader anymore |
| // 2. Delete intents: check if the leader before the operation |
| // 3. Add intents: check if the leader before the operation |
| // |
| for (Intent intent : storeInMemoryIntents) { |
| // Store the intent in memory based on its type |
| if (intent instanceof MultiPointToSinglePointIntent) { |
| MultiPointToSinglePointIntent mp2pIntent = |
| (MultiPointToSinglePointIntent) intent; |
| // Find the IP prefix |
| Criterion c = |
| mp2pIntent.selector().getCriterion(Criterion.Type.IPV4_DST); |
| if (c == null) { |
| // Try IPv6 |
| c = |
| mp2pIntent.selector().getCriterion(Criterion.Type.IPV6_DST); |
| } |
| if (c != null && c instanceof IPCriterion) { |
| IPCriterion ipCriterion = (IPCriterion) c; |
| IpPrefix ipPrefix = ipCriterion.ip(); |
| if (ipPrefix == null) { |
| continue; |
| } |
| log.trace("SDN-IP Intent Synchronizer: updating " + |
| "in-memory Route Intent for prefix {}", |
| ipPrefix); |
| routeIntents.put(ipPrefix, mp2pIntent); |
| } else { |
| log.warn("SDN-IP no IPV4_DST or IPV6_DST criterion found for Intent {}", |
| mp2pIntent.id()); |
| } |
| continue; |
| } |
| if (intent instanceof PointToPointIntent) { |
| PointToPointIntent p2pIntent = (PointToPointIntent) intent; |
| log.trace("SDN-IP Intent Synchronizer: updating " + |
| "in-memory Peer Intent {}", p2pIntent); |
| peerIntents.put(new IntentKey(intent), p2pIntent); |
| continue; |
| } |
| } |
| |
| // Withdraw Intents |
| for (Intent intent : deleteIntents) { |
| intentService.withdraw(intent); |
| log.trace("SDN-IP Intent Synchronizer: withdrawing intent: {}", |
| intent); |
| } |
| if (!isElectedLeader) { |
| log.trace("SDN-IP Intent Synchronizer: cannot withdraw intents: " + |
| "not elected leader anymore"); |
| isActivatedLeader = false; |
| return; |
| } |
| |
| // Add Intents |
| for (Intent intent : addIntents) { |
| intentService.submit(intent); |
| log.trace("SDN-IP Intent Synchronizer: submitting intent: {}", |
| intent); |
| } |
| if (!isElectedLeader) { |
| log.trace("SDN-IP Intent Synchronizer: cannot submit intents: " + |
| "not elected leader anymore"); |
| isActivatedLeader = false; |
| return; |
| } |
| |
| if (isElectedLeader) { |
| isActivatedLeader = true; // Allow push of Intents |
| } else { |
| isActivatedLeader = false; |
| } |
| log.debug("SDN-IP intent synchronization completed"); |
| } |
| } |
| |
| /** |
| * Computes the delta in two sets of Intents: local in-memory Intents, |
| * and intents fetched from the Intent framework. |
| * |
| * @param localIntents the local in-memory Intents |
| * @param fetchedIntents the Intents fetched from the Intent framework |
| * @param storeInMemoryIntents the Intents that should be stored in memory. |
| * Note: This Collection must be allocated by the caller, and it will |
| * be populated by this method. |
| * @param addIntents the Intents that should be added to the Intent |
| * framework. Note: This Collection must be allocated by the caller, and |
| * it will be populated by this method. |
| * @param deleteIntents the Intents that should be deleted from the Intent |
| * framework. Note: This Collection must be allocated by the caller, and |
| * it will be populated by this method. |
| */ |
| private void computeIntentsDelta( |
| final Map<IntentKey, Intent> localIntents, |
| final Map<IntentKey, Intent> fetchedIntents, |
| Collection<Intent> storeInMemoryIntents, |
| Collection<Intent> addIntents, |
| Collection<Intent> deleteIntents) { |
| |
| // |
| // Compute the deltas between the LOCAL in-memory Intents and the |
| // FETCHED Intents: |
| // - If an Intent is in both the LOCAL and FETCHED sets: |
| // If the FETCHED Intent is WITHDRAWING or WITHDRAWN, then |
| // the LOCAL Intent should be added/installed; otherwise the |
| // FETCHED intent should be stored in the local memory |
| // (i.e., override the LOCAL Intent) to preserve the original |
| // Intent ID. |
| // - if a LOCAL Intent is not in the FETCHED set, then the LOCAL |
| // Intent should be added/installed. |
| // - If a FETCHED Intent is not in the LOCAL set, then the FETCHED |
| // Intent should be deleted/withdrawn. |
| // |
| for (Map.Entry<IntentKey, Intent> entry : localIntents.entrySet()) { |
| IntentKey intentKey = entry.getKey(); |
| Intent localIntent = entry.getValue(); |
| Intent fetchedIntent = fetchedIntents.get(intentKey); |
| |
| if (fetchedIntent == null) { |
| // |
| // No FETCHED Intent found: push the LOCAL Intent. |
| // |
| addIntents.add(localIntent); |
| continue; |
| } |
| |
| IntentState state = |
| intentService.getIntentState(fetchedIntent.key()); |
| if (state == null || |
| state == IntentState.WITHDRAWING || |
| state == IntentState.WITHDRAWN) { |
| // The intent has been withdrawn but according to our route |
| // table it should be installed. We'll reinstall it. |
| addIntents.add(localIntent); |
| continue; |
| } |
| storeInMemoryIntents.add(fetchedIntent); |
| } |
| |
| for (Map.Entry<IntentKey, Intent> entry : fetchedIntents.entrySet()) { |
| IntentKey intentKey = entry.getKey(); |
| Intent fetchedIntent = entry.getValue(); |
| Intent localIntent = localIntents.get(intentKey); |
| |
| if (localIntent != null) { |
| continue; |
| } |
| |
| IntentState state = |
| intentService.getIntentState(fetchedIntent.key()); |
| if (state == null || |
| state == IntentState.WITHDRAWING || |
| state == IntentState.WITHDRAWN) { |
| // Nothing to do. The intent has been already withdrawn. |
| continue; |
| } |
| // |
| // No LOCAL Intent found: delete/withdraw the FETCHED Intent. |
| // |
| deleteIntents.add(fetchedIntent); |
| } |
| } |
| |
| /** |
| * Helper class that can be used to compute the key for an Intent by |
| * by excluding the Intent ID. |
| */ |
| static final class IntentKey { |
| private final Intent intent; |
| |
| /** |
| * Constructor. |
| * |
| * @param intent the intent to use |
| */ |
| IntentKey(Intent intent) { |
| checkArgument((intent instanceof MultiPointToSinglePointIntent) || |
| (intent instanceof PointToPointIntent), |
| "Intent type not recognized", intent); |
| this.intent = intent; |
| } |
| |
| /** |
| * Compares two Multi-Point to Single-Point Intents whether they |
| * represent same logical intention. |
| * |
| * @param intent1 the first Intent to compare |
| * @param intent2 the second Intent to compare |
| * @return true if both Intents represent same logical intention, |
| * otherwise false |
| */ |
| static boolean equalIntents(MultiPointToSinglePointIntent intent1, |
| MultiPointToSinglePointIntent intent2) { |
| return Objects.equals(intent1.appId(), intent2.appId()) && |
| Objects.equals(intent1.selector(), intent2.selector()) && |
| Objects.equals(intent1.treatment(), intent2.treatment()) && |
| Objects.equals(intent1.ingressPoints(), intent2.ingressPoints()) && |
| Objects.equals(intent1.egressPoint(), intent2.egressPoint()); |
| } |
| |
| /** |
| * Compares two Point-to-Point Intents whether they represent |
| * same logical intention. |
| * |
| * @param intent1 the first Intent to compare |
| * @param intent2 the second Intent to compare |
| * @return true if both Intents represent same logical intention, |
| * otherwise false |
| */ |
| static boolean equalIntents(PointToPointIntent intent1, |
| PointToPointIntent intent2) { |
| return Objects.equals(intent1.appId(), intent2.appId()) && |
| Objects.equals(intent1.selector(), intent2.selector()) && |
| Objects.equals(intent1.treatment(), intent2.treatment()) && |
| Objects.equals(intent1.ingressPoint(), intent2.ingressPoint()) && |
| Objects.equals(intent1.egressPoint(), intent2.egressPoint()); |
| } |
| |
| @Override |
| public int hashCode() { |
| if (intent instanceof PointToPointIntent) { |
| PointToPointIntent p2pIntent = (PointToPointIntent) intent; |
| return Objects.hash(p2pIntent.appId(), |
| p2pIntent.resources(), |
| p2pIntent.selector(), |
| p2pIntent.treatment(), |
| p2pIntent.constraints(), |
| p2pIntent.ingressPoint(), |
| p2pIntent.egressPoint()); |
| } |
| if (intent instanceof MultiPointToSinglePointIntent) { |
| MultiPointToSinglePointIntent m2pIntent = |
| (MultiPointToSinglePointIntent) intent; |
| return Objects.hash(m2pIntent.appId(), |
| m2pIntent.resources(), |
| m2pIntent.selector(), |
| m2pIntent.treatment(), |
| m2pIntent.constraints(), |
| m2pIntent.ingressPoints(), |
| m2pIntent.egressPoint()); |
| } |
| checkArgument(false, "Intent type not recognized", intent); |
| return 0; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if ((obj == null) || (!(obj instanceof IntentKey))) { |
| return false; |
| } |
| IntentKey other = (IntentKey) obj; |
| |
| if (this.intent instanceof PointToPointIntent) { |
| if (!(other.intent instanceof PointToPointIntent)) { |
| return false; |
| } |
| return equalIntents((PointToPointIntent) this.intent, |
| (PointToPointIntent) other.intent); |
| } |
| if (this.intent instanceof MultiPointToSinglePointIntent) { |
| if (!(other.intent instanceof MultiPointToSinglePointIntent)) { |
| return false; |
| } |
| return equalIntents( |
| (MultiPointToSinglePointIntent) this.intent, |
| (MultiPointToSinglePointIntent) other.intent); |
| } |
| checkArgument(false, "Intent type not recognized", intent); |
| return false; |
| } |
| } |
| |
| @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<ConnectPoint>(); |
| 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. |
| } |
| } |
| |
| @Override |
| public boolean mp2pIntentExists(IpPrefix ipPrefix) { |
| checkNotNull(ipPrefix); |
| return routeIntents.get(ipPrefix) != null; |
| } |
| |
| /** |
| * 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); |
| } |
| } |