| /* |
| * Copyright 2014 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.mobility; |
| import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| |
| 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.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.Device; |
| import org.onosproject.net.Host; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.flow.FlowRule; |
| import org.onosproject.net.flow.FlowRuleService; |
| import org.onosproject.net.flow.criteria.EthCriterion; |
| import org.onosproject.net.flow.criteria.Criterion; |
| import org.onosproject.net.flow.criteria.Criterion.Type; |
| import org.onosproject.net.host.HostEvent; |
| import org.onosproject.net.host.HostListener; |
| import org.onosproject.net.host.HostService; |
| import org.onlab.packet.MacAddress; |
| import org.slf4j.Logger; |
| |
| import com.google.common.collect.Lists; |
| |
| |
| /** |
| * Sample mobility application. Cleans up flowmods when a host moves. |
| */ |
| @Component(immediate = true) |
| public class HostMobility { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected HostService hostService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected FlowRuleService flowRuleService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| private ApplicationId appId; |
| private ExecutorService eventHandler; |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication("org.onosproject.mobility"); |
| eventHandler = newSingleThreadScheduledExecutor(groupedThreads("onos/app-mobility", "event-handler")); |
| hostService.addListener(new InternalHostListener()); |
| log.info("Started with Application ID {}", appId.id()); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| // TODO we never actually add any flow rules |
| flowRuleService.removeFlowRulesById(appId); |
| eventHandler.shutdown(); |
| log.info("Stopped"); |
| } |
| |
| public class InternalHostListener |
| implements HostListener { |
| |
| @Override |
| public void event(HostEvent event) { |
| switch (event.type()) { |
| case HOST_ADDED: |
| case HOST_REMOVED: |
| case HOST_UPDATED: |
| // don't care if a host has been added, removed. |
| break; |
| case HOST_MOVED: |
| log.info("Host {} has moved; cleaning up.", event.subject()); |
| eventHandler.execute(() -> cleanup(event.subject())); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| /** |
| * For a given host, remove any flow rule which references it's addresses. |
| * @param host the host to clean up for |
| */ |
| private void cleanup(Host host) { |
| Iterable<Device> devices = deviceService.getDevices(); |
| List<FlowRule> flowRules = Lists.newLinkedList(); |
| for (Device device : devices) { |
| flowRules.addAll(cleanupDevice(device, host)); |
| } |
| FlowRule[] flows = new FlowRule[flowRules.size()]; |
| flows = flowRules.toArray(flows); |
| flowRuleService.removeFlowRules(flows); |
| } |
| |
| private Collection<? extends FlowRule> cleanupDevice(Device device, Host host) { |
| List<FlowRule> flowRules = Lists.newLinkedList(); |
| MacAddress mac = host.mac(); |
| for (FlowRule rule : flowRuleService.getFlowEntries(device.id())) { |
| for (Criterion c : rule.selector().criteria()) { |
| if (c.type() == Type.ETH_DST || c.type() == Type.ETH_SRC) { |
| EthCriterion eth = (EthCriterion) c; |
| if (eth.mac().equals(mac)) { |
| flowRules.add(rule); |
| } |
| } |
| } |
| } |
| return flowRules; |
| } |
| } |
| } |
| |
| |