| package org.onlab.onos.mobility; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.util.Collection; |
| import java.util.List; |
| |
| 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.onos.ApplicationId; |
| import org.onlab.onos.CoreService; |
| import org.onlab.onos.net.Device; |
| import org.onlab.onos.net.Host; |
| import org.onlab.onos.net.device.DeviceService; |
| import org.onlab.onos.net.flow.FlowRule; |
| import org.onlab.onos.net.flow.FlowRuleService; |
| import org.onlab.onos.net.flow.criteria.Criteria.EthCriterion; |
| import org.onlab.onos.net.flow.criteria.Criterion; |
| import org.onlab.onos.net.flow.criteria.Criterion.Type; |
| import org.onlab.onos.net.host.HostEvent; |
| import org.onlab.onos.net.host.HostListener; |
| import org.onlab.onos.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; |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication("org.onlab.onos.mobility"); |
| hostService.addListener(new InternalHostListener()); |
| log.info("Started with Application ID {}", appId.id()); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| flowRuleService.removeFlowRulesById(appId); |
| 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()); |
| 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); |
| } |
| } |
| } |
| } |
| //TODO: handle ip cleanup |
| return flowRules; |
| } |
| |
| } |
| |
| } |
| |
| |