lldp discovery independent of OF
Change-Id: I720f727f6628e30e5d732e6d7bf742d1b7050812
diff --git a/providers/lldp/src/main/java/org/onlab/onos/provider/lldp/impl/LLDPLinkProvider.java b/providers/lldp/src/main/java/org/onlab/onos/provider/lldp/impl/LLDPLinkProvider.java
new file mode 100644
index 0000000..023940e
--- /dev/null
+++ b/providers/lldp/src/main/java/org/onlab/onos/provider/lldp/impl/LLDPLinkProvider.java
@@ -0,0 +1,165 @@
+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.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();
+ // it's not a switch so leave.
+ if (device.type() != Device.Type.SWITCH) {
+ return;
+ }
+ switch (event.type()) {
+ case DEVICE_ADDED:
+ discoverers.put(event.subject().id(),
+ new LinkDiscovery(event.subject(), packetSevice,
+ providerService, useBDDP));
+ break;
+ case PORT_ADDED:
+ case PORT_UPDATED:
+ if (event.port().isEnabled()) {
+ ld = discoverers.get(event.subject().id());
+ if (ld == null) {
+ return;
+ }
+ ld.addPort(event.port());
+ } else {
+ ConnectPoint point = new ConnectPoint(event.subject().id(),
+ event.port().number());
+ providerService.linksVanished(point);
+ }
+ break;
+ case PORT_REMOVED:
+ ConnectPoint point = new ConnectPoint(event.subject().id(),
+ event.port().number());
+ providerService.linksVanished(point);
+ break;
+ case DEVICE_REMOVED:
+ case DEVICE_SUSPENDED:
+ ld = discoverers.get(event.subject().id());
+ if (ld == null) {
+ return;
+ }
+ ld.stop();
+ providerService.linksVanished(event.subject().id());
+ break;
+ case DEVICE_AVAILABILITY_CHANGED:
+ ld = discoverers.get(event.subject().id());
+ if (ld == null) {
+ return;
+ }
+ if (deviceService.isAvailable(event.subject().id())) {
+ ld.start();
+ } else {
+ providerService.linksVanished(event.subject().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();
+ }
+ }
+ }
+
+}