| /* |
| * 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.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.mastership.MastershipService; |
| 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; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MastershipService masterService; |
| |
| 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); |
| LinkDiscovery ld; |
| for (Device device : deviceService.getDevices()) { |
| ld = new LinkDiscovery(device, packetSevice, masterService, |
| providerService, useBDDP); |
| discoverers.put(device.id(), ld); |
| for (Port p : deviceService.getPorts(device.id())) { |
| if (!p.number().isLogical()) { |
| ld.addPort(p); |
| } |
| } |
| } |
| |
| 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(); |
| if (device == null) { |
| log.error("Device is null."); |
| return; |
| } |
| log.trace("{} {} {}", event.type(), event.subject(), event); |
| final DeviceId deviceId = device.id(); |
| switch (event.type()) { |
| case DEVICE_ADDED: |
| case DEVICE_UPDATED: |
| ld = discoverers.get(deviceId); |
| if (ld == null) { |
| log.debug("Device added ({}) {}", event.type(), deviceId); |
| discoverers.put(deviceId, |
| new LinkDiscovery(device, packetSevice, masterService, |
| providerService, useBDDP)); |
| } else { |
| if (ld.isStopped()) { |
| log.debug("Device restarted ({}) {}", event.type(), deviceId); |
| ld.start(); |
| } |
| } |
| break; |
| case PORT_ADDED: |
| case PORT_UPDATED: |
| if (port.isEnabled()) { |
| ld = discoverers.get(deviceId); |
| if (ld == null) { |
| return; |
| } |
| if (!port.number().isLogical()) { |
| log.debug("Port added {}", port); |
| ld.addPort(port); |
| } |
| } else { |
| log.debug("Port down {}", port); |
| ConnectPoint point = new ConnectPoint(deviceId, |
| port.number()); |
| providerService.linksVanished(point); |
| } |
| break; |
| case PORT_REMOVED: |
| log.debug("Port removed {}", port); |
| ConnectPoint point = new ConnectPoint(deviceId, |
| port.number()); |
| providerService.linksVanished(point); |
| // TODO: Don't we need to removePort from ld? |
| break; |
| case DEVICE_REMOVED: |
| case DEVICE_SUSPENDED: |
| log.debug("Device removed {}", deviceId); |
| ld = discoverers.get(deviceId); |
| if (ld == null) { |
| return; |
| } |
| ld.stop(); |
| providerService.linksVanished(deviceId); |
| break; |
| case DEVICE_AVAILABILITY_CHANGED: |
| ld = discoverers.get(deviceId); |
| if (ld == null) { |
| return; |
| } |
| if (deviceService.isAvailable(deviceId)) { |
| log.debug("Device up {}", deviceId); |
| ld.start(); |
| } else { |
| providerService.linksVanished(deviceId); |
| log.debug("Device down {}", deviceId); |
| ld.stop(); |
| } |
| break; |
| case DEVICE_MASTERSHIP_CHANGED: |
| if (!discoverers.containsKey(deviceId)) { |
| // TODO: ideally, should never reach here |
| log.debug("Device mastership changed ({}) {}", event.type(), deviceId); |
| discoverers.put(deviceId, |
| new LinkDiscovery(device, packetSevice, masterService, |
| providerService, useBDDP)); |
| } |
| break; |
| default: |
| log.debug("Unknown event {}", event); |
| } |
| } |
| |
| @Override |
| public void process(PacketContext context) { |
| if (context == null) { |
| return; |
| } |
| LinkDiscovery ld = discoverers.get( |
| context.inPacket().receivedFrom().deviceId()); |
| if (ld == null) { |
| return; |
| } |
| |
| if (ld.handleLLDP(context)) { |
| context.block(); |
| } |
| } |
| } |
| |
| } |