| package org.onlab.onos.provider.lldp.impl; |
| |
| 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.net.ConnectPoint; |
| import org.onlab.onos.net.Device; |
| import org.onlab.onos.net.DeviceId; |
| import org.onlab.onos.net.Port; |
| import org.onlab.onos.net.device.DeviceEvent; |
| import org.onlab.onos.net.device.DeviceListener; |
| import org.onlab.onos.net.device.DeviceService; |
| import org.onlab.onos.net.link.LinkProvider; |
| import org.onlab.onos.net.link.LinkProviderRegistry; |
| import org.onlab.onos.net.link.LinkProviderService; |
| import org.onlab.onos.net.packet.PacketContext; |
| import org.onlab.onos.net.packet.PacketProcessor; |
| import org.onlab.onos.net.packet.PacketService; |
| import org.onlab.onos.net.provider.AbstractProvider; |
| import org.onlab.onos.net.provider.ProviderId; |
| import org.slf4j.Logger; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| |
| /** |
| * Provider which uses an OpenFlow controller to detect network |
| * infrastructure links. |
| */ |
| @Component(immediate = true) |
| public class LLDPLinkProvider extends AbstractProvider implements LinkProvider { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkProviderRegistry providerRegistry; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetSevice; |
| |
| private LinkProviderService providerService; |
| |
| private final boolean useBDDP = true; |
| |
| |
| private final InternalLinkProvider listener = new InternalLinkProvider(); |
| |
| protected final Map<DeviceId, LinkDiscovery> discoverers = new ConcurrentHashMap<>(); |
| |
| /** |
| * Creates an OpenFlow link provider. |
| */ |
| public LLDPLinkProvider() { |
| super(new ProviderId("lldp", "org.onlab.onos.provider.lldp")); |
| } |
| |
| @Activate |
| public void activate() { |
| providerService = providerRegistry.register(this); |
| deviceService.addListener(listener); |
| packetSevice.addProcessor(listener, 0); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| for (LinkDiscovery ld : discoverers.values()) { |
| ld.stop(); |
| } |
| providerRegistry.unregister(this); |
| deviceService.removeListener(listener); |
| packetSevice.removeProcessor(listener); |
| providerService = null; |
| |
| log.info("Stopped"); |
| } |
| |
| |
| private class InternalLinkProvider implements PacketProcessor, DeviceListener { |
| |
| @Override |
| public void event(DeviceEvent event) { |
| LinkDiscovery ld = null; |
| Device device = event.subject(); |
| Port port = event.port(); |
| switch (event.type()) { |
| case DEVICE_ADDED: |
| discoverers.put(device.id(), |
| new LinkDiscovery(device, packetSevice, |
| providerService, useBDDP)); |
| break; |
| case PORT_ADDED: |
| case PORT_UPDATED: |
| if (event.port().isEnabled()) { |
| ld = discoverers.get(device.id()); |
| if (ld == null) { |
| return; |
| } |
| ld.addPort(port); |
| } else { |
| ConnectPoint point = new ConnectPoint(device.id(), |
| port.number()); |
| providerService.linksVanished(point); |
| } |
| break; |
| case PORT_REMOVED: |
| ConnectPoint point = new ConnectPoint(device.id(), |
| port.number()); |
| providerService.linksVanished(point); |
| break; |
| case DEVICE_REMOVED: |
| case DEVICE_SUSPENDED: |
| ld = discoverers.get(device.id()); |
| if (ld == null) { |
| return; |
| } |
| ld.stop(); |
| providerService.linksVanished(device.id()); |
| break; |
| case DEVICE_AVAILABILITY_CHANGED: |
| ld = discoverers.get(device.id()); |
| if (ld == null) { |
| return; |
| } |
| if (deviceService.isAvailable(device.id())) { |
| ld.start(); |
| } else { |
| providerService.linksVanished(device.id()); |
| ld.stop(); |
| } |
| break; |
| case DEVICE_UPDATED: |
| case DEVICE_MASTERSHIP_CHANGED: |
| break; |
| default: |
| log.debug("Unknown event {}", event); |
| } |
| } |
| |
| @Override |
| public void process(PacketContext context) { |
| LinkDiscovery ld = discoverers.get( |
| context.inPacket().receivedFrom().deviceId()); |
| if (ld == null) { |
| return; |
| } |
| |
| if (ld.handleLLDP(context)) { |
| context.block(); |
| } |
| } |
| } |
| |
| } |