alshabib | 7911a05 | 2014-10-16 17:49:37 -0700 | [diff] [blame^] | 1 | package org.onlab.onos.provider.lldp.impl; |
| 2 | |
| 3 | import org.apache.felix.scr.annotations.Activate; |
| 4 | import org.apache.felix.scr.annotations.Component; |
| 5 | import org.apache.felix.scr.annotations.Deactivate; |
| 6 | import org.apache.felix.scr.annotations.Reference; |
| 7 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 8 | import org.onlab.onos.net.ConnectPoint; |
| 9 | import org.onlab.onos.net.Device; |
| 10 | import org.onlab.onos.net.DeviceId; |
| 11 | import org.onlab.onos.net.device.DeviceEvent; |
| 12 | import org.onlab.onos.net.device.DeviceListener; |
| 13 | import org.onlab.onos.net.device.DeviceService; |
| 14 | import org.onlab.onos.net.link.LinkProvider; |
| 15 | import org.onlab.onos.net.link.LinkProviderRegistry; |
| 16 | import org.onlab.onos.net.link.LinkProviderService; |
| 17 | import org.onlab.onos.net.packet.PacketContext; |
| 18 | import org.onlab.onos.net.packet.PacketProcessor; |
| 19 | import org.onlab.onos.net.packet.PacketService; |
| 20 | import org.onlab.onos.net.provider.AbstractProvider; |
| 21 | import org.onlab.onos.net.provider.ProviderId; |
| 22 | import org.slf4j.Logger; |
| 23 | |
| 24 | import java.util.Map; |
| 25 | import java.util.concurrent.ConcurrentHashMap; |
| 26 | |
| 27 | import static org.slf4j.LoggerFactory.getLogger; |
| 28 | |
| 29 | |
| 30 | /** |
| 31 | * Provider which uses an OpenFlow controller to detect network |
| 32 | * infrastructure links. |
| 33 | */ |
| 34 | @Component(immediate = true) |
| 35 | public class LLDPLinkProvider extends AbstractProvider implements LinkProvider { |
| 36 | |
| 37 | private final Logger log = getLogger(getClass()); |
| 38 | |
| 39 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 40 | protected LinkProviderRegistry providerRegistry; |
| 41 | |
| 42 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 43 | protected DeviceService deviceService; |
| 44 | |
| 45 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 46 | protected PacketService packetSevice; |
| 47 | |
| 48 | private LinkProviderService providerService; |
| 49 | |
| 50 | private final boolean useBDDP = true; |
| 51 | |
| 52 | |
| 53 | private final InternalLinkProvider listener = new InternalLinkProvider(); |
| 54 | |
| 55 | protected final Map<DeviceId, LinkDiscovery> discoverers = new ConcurrentHashMap<>(); |
| 56 | |
| 57 | /** |
| 58 | * Creates an OpenFlow link provider. |
| 59 | */ |
| 60 | public LLDPLinkProvider() { |
| 61 | super(new ProviderId("lldp", "org.onlab.onos.provider.lldp")); |
| 62 | } |
| 63 | |
| 64 | @Activate |
| 65 | public void activate() { |
| 66 | providerService = providerRegistry.register(this); |
| 67 | deviceService.addListener(listener); |
| 68 | packetSevice.addProcessor(listener, 0); |
| 69 | |
| 70 | log.info("Started"); |
| 71 | } |
| 72 | |
| 73 | @Deactivate |
| 74 | public void deactivate() { |
| 75 | for (LinkDiscovery ld : discoverers.values()) { |
| 76 | ld.stop(); |
| 77 | } |
| 78 | providerRegistry.unregister(this); |
| 79 | deviceService.removeListener(listener); |
| 80 | packetSevice.removeProcessor(listener); |
| 81 | providerService = null; |
| 82 | |
| 83 | log.info("Stopped"); |
| 84 | } |
| 85 | |
| 86 | |
| 87 | private class InternalLinkProvider implements PacketProcessor, DeviceListener { |
| 88 | |
| 89 | @Override |
| 90 | public void event(DeviceEvent event) { |
| 91 | LinkDiscovery ld = null; |
| 92 | Device device = event.subject(); |
| 93 | // it's not a switch so leave. |
| 94 | if (device.type() != Device.Type.SWITCH) { |
| 95 | return; |
| 96 | } |
| 97 | switch (event.type()) { |
| 98 | case DEVICE_ADDED: |
| 99 | discoverers.put(event.subject().id(), |
| 100 | new LinkDiscovery(event.subject(), packetSevice, |
| 101 | providerService, useBDDP)); |
| 102 | break; |
| 103 | case PORT_ADDED: |
| 104 | case PORT_UPDATED: |
| 105 | if (event.port().isEnabled()) { |
| 106 | ld = discoverers.get(event.subject().id()); |
| 107 | if (ld == null) { |
| 108 | return; |
| 109 | } |
| 110 | ld.addPort(event.port()); |
| 111 | } else { |
| 112 | ConnectPoint point = new ConnectPoint(event.subject().id(), |
| 113 | event.port().number()); |
| 114 | providerService.linksVanished(point); |
| 115 | } |
| 116 | break; |
| 117 | case PORT_REMOVED: |
| 118 | ConnectPoint point = new ConnectPoint(event.subject().id(), |
| 119 | event.port().number()); |
| 120 | providerService.linksVanished(point); |
| 121 | break; |
| 122 | case DEVICE_REMOVED: |
| 123 | case DEVICE_SUSPENDED: |
| 124 | ld = discoverers.get(event.subject().id()); |
| 125 | if (ld == null) { |
| 126 | return; |
| 127 | } |
| 128 | ld.stop(); |
| 129 | providerService.linksVanished(event.subject().id()); |
| 130 | break; |
| 131 | case DEVICE_AVAILABILITY_CHANGED: |
| 132 | ld = discoverers.get(event.subject().id()); |
| 133 | if (ld == null) { |
| 134 | return; |
| 135 | } |
| 136 | if (deviceService.isAvailable(event.subject().id())) { |
| 137 | ld.start(); |
| 138 | } else { |
| 139 | providerService.linksVanished(event.subject().id()); |
| 140 | ld.stop(); |
| 141 | } |
| 142 | break; |
| 143 | case DEVICE_UPDATED: |
| 144 | case DEVICE_MASTERSHIP_CHANGED: |
| 145 | break; |
| 146 | default: |
| 147 | log.debug("Unknown event {}", event); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | @Override |
| 152 | public void process(PacketContext context) { |
| 153 | LinkDiscovery ld = discoverers.get( |
| 154 | context.inPacket().receivedFrom().deviceId()); |
| 155 | if (ld == null) { |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | if (ld.handleLLDP(context)) { |
| 160 | context.block(); |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | } |