protocol independent host tracker
Change-Id: I192a17ee6eee347f6a7d8e251cecc49cbe36f8dc
diff --git a/providers/host/src/main/java/org/onlab/onos/provider/host/impl/HostLocationProvider.java b/providers/host/src/main/java/org/onlab/onos/provider/host/impl/HostLocationProvider.java
new file mode 100644
index 0000000..d22106c
--- /dev/null
+++ b/providers/host/src/main/java/org/onlab/onos/provider/host/impl/HostLocationProvider.java
@@ -0,0 +1,120 @@
+package org.onlab.onos.provider.host.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.Host;
+import org.onlab.onos.net.HostId;
+import org.onlab.onos.net.HostLocation;
+import org.onlab.onos.net.host.DefaultHostDescription;
+import org.onlab.onos.net.host.HostDescription;
+import org.onlab.onos.net.host.HostProvider;
+import org.onlab.onos.net.host.HostProviderRegistry;
+import org.onlab.onos.net.host.HostProviderService;
+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.onlab.onos.net.topology.Topology;
+import org.onlab.onos.net.topology.TopologyService;
+
+import org.onlab.packet.ARP;
+import org.onlab.packet.Ethernet;
+
+import org.onlab.packet.IpPrefix;
+import org.onlab.packet.VlanId;
+import org.slf4j.Logger;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Provider which uses an OpenFlow controller to detect network
+ * end-station hosts.
+ */
+@Component(immediate = true)
+public class HostLocationProvider extends AbstractProvider implements HostProvider {
+
+ private final Logger log = getLogger(getClass());
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected HostProviderRegistry providerRegistry;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected PacketService pktService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected TopologyService topologyService;
+
+ private HostProviderService providerService;
+
+ private final InternalHostProvider processor = new InternalHostProvider();
+
+
+ /**
+ * Creates an OpenFlow host provider.
+ */
+ public HostLocationProvider() {
+ super(new ProviderId("of", "org.onlab.onos.provider.host"));
+ }
+
+ @Activate
+ public void activate() {
+ providerService = providerRegistry.register(this);
+ pktService.addProcessor(processor, 1);
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ providerRegistry.unregister(this);
+ pktService.removeProcessor(processor);
+ providerService = null;
+ log.info("Stopped");
+ }
+
+ @Override
+ public void triggerProbe(Host host) {
+ log.info("Triggering probe on device {}", host);
+ }
+
+ private class InternalHostProvider implements PacketProcessor {
+
+ @Override
+ public void process(PacketContext context) {
+ Ethernet eth = context.inPacket().parsed();
+
+ VlanId vlan = VlanId.vlanId(eth.getVlanID());
+ ConnectPoint heardOn = context.inPacket().receivedFrom();
+
+ // If this is not an edge port, bail out.
+ Topology topology = topologyService.currentTopology();
+ if (topologyService.isInfrastructure(topology, heardOn)) {
+ return;
+ }
+
+ HostLocation hloc = new HostLocation(heardOn, System.currentTimeMillis());
+
+ HostId hid = HostId.hostId(eth.getSourceMAC(), vlan);
+
+ // Potentially a new or moved host
+ if (eth.getEtherType() == Ethernet.TYPE_ARP) {
+ ARP arp = (ARP) eth.getPayload();
+ IpPrefix ip = IpPrefix.valueOf(arp.getSenderProtocolAddress());
+ HostDescription hdescr =
+ new DefaultHostDescription(eth.getSourceMAC(), vlan, hloc, ip);
+ providerService.hostDetected(hid, hdescr);
+
+ } else if (eth.getEtherType() == Ethernet.TYPE_IPV4) {
+ //Do not learn new ip from ip packet.
+ HostDescription hdescr =
+ new DefaultHostDescription(eth.getSourceMAC(), vlan, hloc);
+ providerService.hostDetected(hid, hdescr);
+
+ }
+ }
+ }
+}