2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.controller.hosttracker.internal;
11 import java.net.InetAddress;
12 import java.net.UnknownHostException;
13 import java.util.ArrayList;
14 import java.util.Collections;
15 import java.util.Dictionary;
16 import java.util.EnumSet;
17 import java.util.HashSet;
18 import java.util.List;
20 import java.util.Map.Entry;
22 import java.util.Timer;
23 import java.util.TimerTask;
24 import java.util.concurrent.Callable;
25 import java.util.concurrent.ConcurrentHashMap;
26 import java.util.concurrent.ConcurrentMap;
27 import java.util.concurrent.ExecutorService;
28 import java.util.concurrent.Executors;
29 import java.util.concurrent.Future;
31 import org.apache.felix.dm.Component;
32 import org.eclipse.osgi.framework.console.CommandInterpreter;
33 import org.eclipse.osgi.framework.console.CommandProvider;
34 import org.opendaylight.controller.clustering.services.CacheConfigException;
35 import org.opendaylight.controller.clustering.services.CacheExistException;
36 import org.opendaylight.controller.clustering.services.ICacheUpdateAware;
37 import org.opendaylight.controller.clustering.services.IClusterContainerServices;
38 import org.opendaylight.controller.clustering.services.IClusterServices;
39 import org.opendaylight.controller.hosttracker.IfHostListener;
40 import org.opendaylight.controller.hosttracker.IfIptoHost;
41 import org.opendaylight.controller.hosttracker.IfNewHostNotify;
42 import org.opendaylight.controller.hosttracker.hostAware.HostNodeConnector;
43 import org.opendaylight.controller.hosttracker.hostAware.IHostFinder;
44 import org.opendaylight.controller.sal.core.ConstructionException;
45 import org.opendaylight.controller.sal.core.Edge;
46 import org.opendaylight.controller.sal.core.Host;
47 import org.opendaylight.controller.sal.core.Node;
48 import org.opendaylight.controller.sal.core.NodeConnector;
49 import org.opendaylight.controller.sal.core.Property;
50 import org.opendaylight.controller.sal.core.State;
51 import org.opendaylight.controller.sal.core.Tier;
52 import org.opendaylight.controller.sal.core.UpdateType;
53 import org.opendaylight.controller.sal.packet.address.DataLinkAddress;
54 import org.opendaylight.controller.sal.packet.address.EthernetAddress;
55 import org.opendaylight.controller.sal.topology.TopoEdgeUpdate;
56 import org.opendaylight.controller.sal.utils.GlobalConstants;
57 import org.opendaylight.controller.sal.utils.HexEncode;
58 import org.opendaylight.controller.sal.utils.NetUtils;
59 import org.opendaylight.controller.sal.utils.NodeCreator;
60 import org.opendaylight.controller.sal.utils.Status;
61 import org.opendaylight.controller.sal.utils.StatusCode;
62 import org.opendaylight.controller.switchmanager.IInventoryListener;
63 import org.opendaylight.controller.switchmanager.ISwitchManager;
64 import org.opendaylight.controller.switchmanager.ISwitchManagerAware;
65 import org.opendaylight.controller.switchmanager.Subnet;
66 import org.opendaylight.controller.topologymanager.ITopologyManager;
67 import org.opendaylight.controller.topologymanager.ITopologyManagerAware;
68 import org.osgi.framework.BundleContext;
69 import org.osgi.framework.FrameworkUtil;
70 import org.slf4j.Logger;
71 import org.slf4j.LoggerFactory;
74 * @file HostTracker.java This class tracks the location of IP Hosts as to which
75 * Switch, Port, VLAN, they are connected to, as well as their MAC
76 * address. This is done dynamically as well as statically. The dynamic
77 * mechanism consists of listening to ARP messages as well sending ARP
78 * requests. Static mechanism consists of Northbound APIs to add or remove
79 * the hosts from the local database. ARP aging is also implemented to age
80 * out dynamically learned hosts. Interface methods are provided for other
81 * applications to 1. Query the local database for a single host 2. Get a
82 * list of all hosts 3. Get notification if a host is learned/added or
83 * removed the database
86 public class HostTracker implements IfIptoHost, IfHostListener, ISwitchManagerAware, IInventoryListener,
87 ITopologyManagerAware, ICacheUpdateAware<InetAddress, HostNodeConnector>, CommandProvider {
88 static final String ACTIVE_HOST_CACHE = "hosttracker.ActiveHosts";
89 static final String INACTIVE_HOST_CACHE = "hosttracker.InactiveHosts";
90 private static final Logger logger = LoggerFactory.getLogger(HostTracker.class);
91 protected IHostFinder hostFinder;
92 protected ConcurrentMap<InetAddress, HostNodeConnector> hostsDB;
94 * Following is a list of hosts which have been requested by NB APIs to be
95 * added, but either the switch or the port is not sup, so they will be
96 * added here until both come up
98 private ConcurrentMap<NodeConnector, HostNodeConnector> inactiveStaticHosts;
99 private final Set<IfNewHostNotify> newHostNotify = Collections.synchronizedSet(new HashSet<IfNewHostNotify>());
101 private ITopologyManager topologyManager;
102 protected IClusterContainerServices clusterContainerService = null;
103 protected ISwitchManager switchManager = null;
105 private Timer arpRefreshTimer;
106 private String containerName = null;
107 private ExecutorService executor;
108 protected boolean stopping;
109 private static class ARPPending {
110 protected InetAddress hostIP;
111 protected short sent_count;
112 protected HostTrackerCallable hostTrackerCallable;
114 public InetAddress getHostIP() {
118 public short getSent_count() {
122 public HostTrackerCallable getHostTrackerCallable() {
123 return hostTrackerCallable;
126 public void setHostIP(InetAddress networkAddr) {
127 this.hostIP = networkAddr;
130 public void setSent_count(short count) {
131 this.sent_count = count;
134 public void setHostTrackerCallable(HostTrackerCallable callable) {
135 hostTrackerCallable = callable;
139 // This list contains the hosts for which ARP requests are being sent
141 ConcurrentMap<InetAddress, ARPPending> ARPPendingList;
143 * This list below contains the hosts which were initially in ARPPendingList
144 * above, but ARP response didn't come from there hosts after multiple
145 * attempts over 8 seconds. The assumption is that the response didn't come
146 * back due to one of the following possibilities: 1. The L3 interface
147 * wasn't created for this host in the controller. This would cause
148 * arphandler not to know where to send the ARP 2. The host facing port is
149 * down 3. The IP host doesn't exist or is not responding to ARP requests
151 * Conditions 1 and 2 above can be recovered if ARP is sent when the
152 * relevant L3 interface is added or the port facing host comes up. Whenever
153 * L3 interface is added or host facing port comes up, ARP will be sent to
154 * hosts in this list.
156 * We can't recover from condition 3 above
158 ConcurrentMap<InetAddress, ARPPending> failedARPReqList;
160 public HostTracker() {
163 private void startUp() {
164 nonClusterObjectCreate();
170 timer.schedule(new OutStandingARPHandler(), 4000, 4000);
171 executor = Executors.newFixedThreadPool(2);
172 /* ARP Refresh Timer to go off every 5 seconds to implement ARP aging */
173 arpRefreshTimer = new Timer();
174 arpRefreshTimer.schedule(new ARPRefreshHandler(), 5000, 5000);
175 logger.debug("startUp: Caches created, timers started");
178 private void allocateCache() {
179 if (this.clusterContainerService == null) {
180 logger.error("un-initialized clusterContainerService, can't create cache");
183 logger.debug("Creating Cache for HostTracker");
185 this.clusterContainerService.createCache(ACTIVE_HOST_CACHE,
186 EnumSet.of(IClusterServices.cacheMode.TRANSACTIONAL));
187 this.clusterContainerService.createCache(INACTIVE_HOST_CACHE,
188 EnumSet.of(IClusterServices.cacheMode.TRANSACTIONAL));
189 } catch (CacheConfigException cce) {
190 logger.error("Cache couldn't be created for HostTracker - check cache mode");
191 } catch (CacheExistException cce) {
192 logger.error("Cache for HostTracker already exists, destroy and recreate");
194 logger.debug("Cache successfully created for HostTracker");
197 @SuppressWarnings({ "unchecked" })
198 private void retrieveCache() {
199 if (this.clusterContainerService == null) {
200 logger.error("un-initialized clusterContainerService, can't retrieve cache");
203 logger.debug("Retrieving cache for HostTrackerAH");
204 hostsDB = (ConcurrentMap<InetAddress, HostNodeConnector>) this.clusterContainerService
205 .getCache(ACTIVE_HOST_CACHE);
206 if (hostsDB == null) {
207 logger.error("Cache couldn't be retrieved for HostTracker");
209 logger.debug("Cache was successfully retrieved for HostTracker");
210 logger.debug("Retrieving cache for HostTrackerIH");
211 inactiveStaticHosts = (ConcurrentMap<NodeConnector, HostNodeConnector>) this.clusterContainerService
212 .getCache(INACTIVE_HOST_CACHE);
213 if (inactiveStaticHosts == null) {
214 logger.error("Cache couldn't be retrieved for HostTrackerIH");
216 logger.debug("Cache was successfully retrieved for HostTrackerIH");
219 public void nonClusterObjectCreate() {
220 hostsDB = new ConcurrentHashMap<InetAddress, HostNodeConnector>();
221 inactiveStaticHosts = new ConcurrentHashMap<NodeConnector, HostNodeConnector>();
222 ARPPendingList = new ConcurrentHashMap<InetAddress, ARPPending>();
223 failedARPReqList = new ConcurrentHashMap<InetAddress, ARPPending>();
226 public void shutDown() {
229 public void setnewHostNotify(IfNewHostNotify obj) {
230 this.newHostNotify.add(obj);
233 public void unsetnewHostNotify(IfNewHostNotify obj) {
234 this.newHostNotify.remove(obj);
237 public void setArpHandler(IHostFinder hostFinder) {
238 this.hostFinder = hostFinder;
241 public void unsetArpHandler(IHostFinder hostFinder) {
242 if (this.hostFinder == hostFinder) {
243 logger.debug("Arp Handler Service removed!");
244 this.hostFinder = null;
248 public void setTopologyManager(ITopologyManager s) {
249 this.topologyManager = s;
252 public void unsetTopologyManager(ITopologyManager s) {
253 if (this.topologyManager == s) {
254 logger.debug("Topology Manager Service removed!");
255 this.topologyManager = null;
259 private boolean hostExists(HostNodeConnector host) {
260 HostNodeConnector lhost = hostsDB.get(host.getNetworkAddress());
261 return host.equals(lhost);
264 private HostNodeConnector getHostFromOnActiveDB(InetAddress networkAddress) {
265 return hostsDB.get(networkAddress);
268 private Entry<NodeConnector, HostNodeConnector> getHostFromInactiveDB(InetAddress networkAddress) {
269 for (Entry<NodeConnector, HostNodeConnector> entry : inactiveStaticHosts.entrySet()) {
270 if (entry.getValue().equalsByIP(networkAddress)) {
271 logger.debug("getHostFromInactiveDB(): Inactive Host found for IP:{} ", networkAddress.getHostAddress());
275 logger.debug("getHostFromInactiveDB() Inactive Host Not found for IP: {}", networkAddress.getHostAddress());
279 private void removeHostFromInactiveDB(InetAddress networkAddress) {
280 NodeConnector nodeConnector = null;
281 for (Entry<NodeConnector, HostNodeConnector> entry : inactiveStaticHosts.entrySet()) {
282 if (entry.getValue().equalsByIP(networkAddress)) {
283 nodeConnector = entry.getKey();
287 if (nodeConnector != null) {
288 inactiveStaticHosts.remove(nodeConnector);
289 logger.debug("removeHostFromInactiveDB(): Host Removed for IP: {}", networkAddress.getHostAddress());
292 logger.debug("removeHostFromInactiveDB(): Host Not found for IP: {}", networkAddress.getHostAddress());
295 protected boolean hostMoved(HostNodeConnector host) {
296 if (hostQuery(host.getNetworkAddress()) != null) {
303 public HostNodeConnector hostQuery(InetAddress networkAddress) {
304 return hostsDB.get(networkAddress);
308 public Future<HostNodeConnector> discoverHost(InetAddress networkAddress) {
309 if (executor == null) {
310 logger.debug("discoverHost: Null executor");
313 Callable<HostNodeConnector> worker = new HostTrackerCallable(this, networkAddress);
314 Future<HostNodeConnector> submit = executor.submit(worker);
319 public HostNodeConnector hostFind(InetAddress networkAddress) {
321 * Sometimes at boot with containers configured in the startup we hit
322 * this path (from TIF) when hostFinder has not been set yet Caller
323 * already handles the null return
326 if (hostFinder == null) {
327 logger.debug("Exiting hostFind, null hostFinder");
331 HostNodeConnector host = hostQuery(networkAddress);
333 logger.debug("hostFind(): Host found for IP: {}", networkAddress.getHostAddress());
337 /* Add this host to ARPPending List for any potential retries */
339 addToARPPendingList(networkAddress);
340 logger.debug("hostFind(): Host Not Found for IP: {}, Inititated Host Discovery ...",
341 networkAddress.getHostAddress());
343 /* host is not found, initiate a discovery */
345 hostFinder.find(networkAddress);
350 public Set<HostNodeConnector> getAllHosts() {
351 Set<HostNodeConnector> allHosts = new HashSet<HostNodeConnector>(hostsDB.values());
356 public Set<HostNodeConnector> getActiveStaticHosts() {
357 Set<HostNodeConnector> list = new HashSet<HostNodeConnector>();
358 for (Entry<InetAddress, HostNodeConnector> entry : hostsDB.entrySet()) {
359 HostNodeConnector host = entry.getValue();
360 if (host.isStaticHost()) {
368 public Set<HostNodeConnector> getInactiveStaticHosts() {
369 Set<HostNodeConnector> list = new HashSet<HostNodeConnector>(inactiveStaticHosts.values());
373 private void addToARPPendingList(InetAddress networkAddr) {
374 ARPPending arphost = new ARPPending();
376 arphost.setHostIP(networkAddr);
377 arphost.setSent_count((short) 1);
378 ARPPendingList.put(networkAddr, arphost);
379 logger.debug("Host Added to ARPPending List, IP: {}", networkAddr);
382 public void setCallableOnPendingARP(InetAddress networkAddr, HostTrackerCallable callable) {
384 for (Entry<InetAddress, ARPPending> entry : ARPPendingList.entrySet()) {
385 arphost = entry.getValue();
386 if (arphost.getHostIP().equals(networkAddr)) {
387 arphost.setHostTrackerCallable(callable);
392 private void processPendingARPReqs(InetAddress networkAddr) {
395 if ((arphost = ARPPendingList.remove(networkAddr)) != null) {
396 // Remove the arphost from ARPPendingList as it has been learned now
397 logger.debug("Host Removed from ARPPending List, IP: {}", networkAddr);
398 HostTrackerCallable htCallable = arphost.getHostTrackerCallable();
399 if (htCallable != null) {
406 * It could have been a host from the FailedARPReqList
409 if (failedARPReqList.containsKey(networkAddr)) {
410 failedARPReqList.remove(networkAddr);
411 logger.debug("Host Removed from FailedARPReqList List, IP: {}", networkAddr);
416 private void learnNewHost(HostNodeConnector host) {
417 host.initArpSendCountDown();
418 HostNodeConnector rHost = hostsDB.putIfAbsent(host.getNetworkAddress(), host);
420 // Another host is already learned for this IP address, replace it
421 replaceHost(host.getNetworkAddress(), rHost, host);
423 logger.debug("New Host Learned: MAC: {} IP: {}", HexEncode.bytesToHexString(host
424 .getDataLayerAddressBytes()), host.getNetworkAddress().getHostAddress());
428 private void replaceHost(InetAddress networkAddr, HostNodeConnector removedHost, HostNodeConnector newHost) {
429 // Ignore ARP messages from internal nodes
430 NodeConnector newHostNc = newHost.getnodeConnector();
431 boolean newHostIsInternal = topologyManager.isInternal(newHostNc);
432 if (newHostIsInternal) {
436 newHost.initArpSendCountDown();
438 if (hostsDB.replace(networkAddr, removedHost, newHost)) {
439 logger.debug("Host move occurred: Old Host IP:{}, New Host IP: {}", removedHost.getNetworkAddress()
440 .getHostAddress(), newHost.getNetworkAddress().getHostAddress());
441 logger.debug("Old Host MAC: {}, New Host MAC: {}",
442 HexEncode.bytesToHexString(removedHost.getDataLayerAddressBytes()),
443 HexEncode.bytesToHexString(newHost.getDataLayerAddressBytes()));
444 // Display the Old and New HostNodeConnectors also
445 logger.debug("Old {}, New {}", removedHost, newHost);
448 * Host replacement has failed, do the recovery
450 hostsDB.put(networkAddr, newHost);
451 logger.error("Host replacement failed. Overwrite the host. Repalced Host: {}, New Host: {}", removedHost,
454 notifyHostLearnedOrRemoved(removedHost, false);
455 notifyHostLearnedOrRemoved(newHost, true);
456 if (!newHost.isStaticHost()) {
457 processPendingARPReqs(networkAddr);
462 private void removeKnownHost(InetAddress key) {
463 HostNodeConnector host = hostsDB.get(key);
465 logger.debug("Removing Host: IP:{}", host.getNetworkAddress().getHostAddress());
468 logger.error("removeKnownHost(): Host for IP address {} not found in hostsDB", key.getHostAddress());
472 private class NotifyHostThread extends Thread {
474 private final HostNodeConnector host;
476 public NotifyHostThread(HostNodeConnector h) {
482 HostNodeConnector removedHost = null;
483 InetAddress networkAddr = host.getNetworkAddress();
485 /* Check for Host Move case */
486 if (hostMoved(host)) {
488 * Host has been moved from one location (switch,port, MAC, or
489 * VLAN) to another. Replace the existing host and its previous
490 * location parameters with new information, and notify the
491 * applications listening to host move.
493 removedHost = hostsDB.get(networkAddr);
494 if (removedHost != null) {
495 replaceHost(networkAddr, removedHost, host);
498 logger.error("Host to be removed not found in hostsDB");
505 /* check if there is an outstanding request for this host */
506 processPendingARPReqs(networkAddr);
507 notifyHostLearnedOrRemoved(host, true);
512 public void hostListener(HostNodeConnector host) {
514 logger.debug("ARP received for Host: IP {}, MAC {}, {}", host.getNetworkAddress().getHostAddress(),
515 HexEncode.bytesToHexString(host.getDataLayerAddressBytes()), host);
516 if (hostExists(host)) {
517 HostNodeConnector existinghost = hostsDB.get(host.getNetworkAddress());
518 existinghost.initArpSendCountDown();
520 hostsDB.put(host.getNetworkAddress(), existinghost);
523 new NotifyHostThread(host).start();
526 // Notify whoever is interested that a new host was learned (dynamically or
528 private void notifyHostLearnedOrRemoved(HostNodeConnector host, boolean add) {
529 // Update listeners if any
530 if (newHostNotify != null) {
531 logger.debug("Notifying Applications for Host {} Being {}", host.getNetworkAddress().getHostAddress(),
532 add ? "Added" : "Deleted");
533 synchronized (this.newHostNotify) {
534 for (IfNewHostNotify ta : newHostNotify) {
537 ta.notifyHTClient(host);
539 ta.notifyHTClientHostRemoved(host);
541 } catch (Exception e) {
542 logger.error("Exception on new host notification", e);
547 logger.error("notifyHostLearnedOrRemoved(): New host notify is null");
550 // Topology update is for some reason outside of listeners registry
552 Node node = host.getnodeconnectorNode();
554 NodeConnector p = host.getnodeConnector();
556 DataLinkAddress dla = new EthernetAddress(host.getDataLayerAddressBytes());
557 h = new Host(dla, host.getNetworkAddress());
558 } catch (ConstructionException ce) {
563 if (topologyManager != null && p != null && h != null) {
564 logger.debug("Notifying Topology Manager for Host {} Being {}", h.getNetworkAddress().getHostAddress(),
565 add ? "Added" : "Deleted");
567 Tier tier = new Tier(1);
568 switchManager.setNodeProp(node, tier);
569 topologyManager.updateHostLink(p, h, UpdateType.ADDED, null);
571 // No need to reset the tiering if no other hosts are currently
573 // If this switch was discovered to be an access switch, it
574 // still is even if the host is down
575 Tier tier = new Tier(0);
576 switchManager.setNodeProp(node, tier);
577 topologyManager.updateHostLink(p, h, UpdateType.REMOVED, null);
583 * When a new Host is learnt by the hosttracker module, it places the
584 * directly connected Node in Tier-1 & using this function, updates the Tier
585 * value for all other Nodes in the network hierarchy.
587 * This is a recursive function and it takes care of updating the Tier value
588 * for all the connected and eligible Nodes.
591 * Node that represents one of the Vertex in the Topology Graph.
593 * The Tier on which n belongs
595 @SuppressWarnings("unused")
596 private void updateSwitchTiers(Node n, int currentTier) {
597 Map<Node, Set<Edge>> ndlinks = topologyManager.getNodeEdges();
598 if (ndlinks == null) {
599 logger.debug("updateSwitchTiers(): ndlinks null for Node: {}, Tier:{}", n, currentTier);
602 Set<Edge> links = ndlinks.get(n);
604 logger.debug("updateSwitchTiers(): links null for ndlinks:{}", ndlinks);
607 ArrayList<Node> needsVisiting = new ArrayList<Node>();
608 for (Edge lt : links) {
609 if (!lt.getHeadNodeConnector().getType().equals(NodeConnector.NodeConnectorIDType.OPENFLOW)) {
610 // We don't want to work on Node that are not openflow
614 Node dstNode = lt.getHeadNodeConnector().getNode();
615 if (switchNeedsTieringUpdate(dstNode, currentTier + 1)) {
616 Tier t = new Tier(currentTier + 1);
617 switchManager.setNodeProp(dstNode, t);
618 needsVisiting.add(dstNode);
623 * Due to the nature of the problem, having a separate loop for nodes
624 * that needs visiting provides a decent walk optimization.
626 for (Node node : needsVisiting) {
627 updateSwitchTiers(node, currentTier + 1);
632 * Internal convenience routine to check the eligibility of a Switch for a
633 * Tier update. Any Node with Tier=0 or a Tier value that is greater than
634 * the new Tier Value is eligible for the update.
637 * Node for which the Tier update eligibility is checked
640 * @return <code>true</code> if the Node is eligible for Tier Update
641 * <code>false</code> otherwise
644 private boolean switchNeedsTieringUpdate(Node n, int tier) {
646 logger.error("switchNeedsTieringUpdate(): Null node for tier: {}", tier);
650 * Node could have gone down
652 if (!switchManager.getNodes().contains(n)) {
655 // This is the case where Tier was never set for this node
656 Tier t = (Tier) switchManager.getNodeProp(n, Tier.TierPropName);
660 if (t.getValue() == 0) {
662 } else if (t.getValue() > tier) {
669 * Internal convenience routine to clear all the Tier values to 0. This
670 * cleanup is performed during cases such as Topology Change where the
671 * existing Tier values might become incorrect
673 @SuppressWarnings("unused")
674 private void clearTiers() {
675 Set<Node> nodes = null;
676 if (switchManager == null) {
677 logger.error("clearTiers(): Null switchManager");
680 nodes = switchManager.getNodes();
682 for (Node n : nodes) {
683 Tier t = new Tier(0);
684 switchManager.setNodeProp(n, t);
689 * Internal convenience routine to print the hierarchies of switches.
691 @SuppressWarnings("unused")
692 private void logHierarchies(ArrayList<ArrayList<String>> hierarchies) {
693 String hierarchyString = null;
695 for (ArrayList<String> hierarchy : hierarchies) {
696 StringBuffer buf = new StringBuffer();
697 buf.append("Hierarchy#" + num + " : ");
698 for (String switchName : hierarchy) {
699 buf.append(switchName + "/");
701 logger.debug("{} -> {}", getContainerName(), buf);
707 * getHostNetworkHierarchy is the Back-end routine for the North-Bound API
708 * that returns the Network Hierarchy for a given Host. This API is
709 * typically used by applications like Hadoop for Rack Awareness
713 * IP-Address of the host/node.
714 * @return Network Hierarchies represented by an Array of Array (of
715 * Switch-Ids as String).
718 public List<List<String>> getHostNetworkHierarchy(InetAddress hostAddress) {
719 HostNodeConnector host = hostQuery(hostAddress);
724 List<List<String>> hierarchies = new ArrayList<List<String>>();
725 ArrayList<String> currHierarchy = new ArrayList<String>();
726 hierarchies.add(currHierarchy);
728 Node node = host.getnodeconnectorNode();
729 updateCurrentHierarchy(node, currHierarchy, hierarchies);
734 * dpidToHostNameHack is a hack function for Cisco Live Hadoop Demo. Mininet
735 * is used as the network for Hadoop Demos & in order to give a meaningful
736 * rack-awareness switch names, the DPID is organized in ASCII Characters
737 * and retrieved as string.
741 * @return Ascii String represented by the DPID.
743 private String dpidToHostNameHack(long dpid) {
744 String hex = Long.toHexString(dpid);
746 StringBuffer sb = new StringBuffer();
748 for (int i = 0; i < hex.length(); i++) {
749 result = (int) ((dpid >> (i * 8)) & 0xff);
756 sb.append(String.format("%c", result));
758 return sb.reverse().toString();
762 * A convenient recursive routine to obtain the Hierarchy of Switches.
765 * Current Node in the Recursive routine.
766 * @param currHierarchy
767 * Array of Nodes that make this hierarchy on which the Current
769 * @param fullHierarchy
770 * Array of multiple Hierarchies that represent a given host.
772 @SuppressWarnings("unchecked")
773 private void updateCurrentHierarchy(Node node, ArrayList<String> currHierarchy, List<List<String>> fullHierarchy) {
774 // currHierarchy.add(String.format("%x", currSw.getId()));
775 currHierarchy.add(dpidToHostNameHack((Long) node.getID()));
776 // Shallow copy as required
777 ArrayList<String> currHierarchyClone = (ArrayList<String>) currHierarchy.clone();
779 Map<Node, Set<Edge>> ndlinks = topologyManager.getNodeEdges();
780 if (ndlinks == null) {
781 logger.debug("updateCurrentHierarchy(): topologyManager returned null ndlinks for node: {}", node);
784 Node n = NodeCreator.createOFNode((Long) node.getID());
785 Set<Edge> links = ndlinks.get(n);
787 logger.debug("updateCurrentHierarchy(): Null links for ndlinks");
790 for (Edge lt : links) {
791 if (!lt.getHeadNodeConnector().getType().equals(NodeConnector.NodeConnectorIDType.OPENFLOW)) {
792 // We don't want to work on Node that are not openflow
796 Node dstNode = lt.getHeadNodeConnector().getNode();
798 Tier nodeTier = (Tier) switchManager.getNodeProp(node, Tier.TierPropName);
800 * If the host is directly attached to the src node, then the node
801 * should have been assigned the "Access" tier in
802 * notifyHostLearnedOrRemoved. If not, it would be assigned
803 * "Unknown" tier. Thus the tier of host attached node cannot be
804 * null. If the src node here, is the next node in the hierarchy of
805 * the nodes, then its tier cannot be null
808 Tier dstNodeTier = (Tier) switchManager.getNodeProp(dstNode, Tier.TierPropName);
810 * Skip if the tier of the destination node is null
812 if (dstNodeTier == null) {
815 if (dstNodeTier.getValue() > nodeTier.getValue()) {
816 ArrayList<String> buildHierarchy = currHierarchy;
817 if (currHierarchy.size() > currHierarchyClone.size()) {
818 // Shallow copy as required
819 buildHierarchy = (ArrayList<String>) currHierarchyClone.clone();
820 fullHierarchy.add(buildHierarchy);
822 updateCurrentHierarchy(dstNode, buildHierarchy, fullHierarchy);
827 private void debugEdgeUpdate(Edge e, UpdateType type, Set<Property> props) {
829 Short srcPort = null;
831 Short dstPort = null;
832 boolean added = false;
833 String srcType = null;
834 String dstType = null;
836 if (e == null || type == null) {
837 logger.error("Edge or Update type are null!");
840 srcType = e.getTailNodeConnector().getType();
841 dstType = e.getHeadNodeConnector().getType();
843 if (srcType.equals(NodeConnector.NodeConnectorIDType.PRODUCTION)) {
844 logger.debug("Skip updates for {}", e);
848 if (!srcType.equals(NodeConnector.NodeConnectorIDType.OPENFLOW)) {
849 logger.debug("For now we cannot handle updates for non-openflow nodes");
853 if (dstType.equals(NodeConnector.NodeConnectorIDType.PRODUCTION)) {
854 logger.debug("Skip updates for {}", e);
858 if (!dstType.equals(NodeConnector.NodeConnectorIDType.OPENFLOW)) {
859 logger.debug("For now we cannot handle updates for non-openflow nodes");
863 // At this point we know we got an openflow update, so
864 // lets fill everything accordingly.
865 srcNid = (Long) e.getTailNodeConnector().getNode().getID();
866 srcPort = (Short) e.getTailNodeConnector().getID();
867 dstNid = (Long) e.getHeadNodeConnector().getNode().getID();
868 dstPort = (Short) e.getHeadNodeConnector().getID();
870 // Now lets update the added flag
881 logger.debug("HostTracker Topology linkUpdate handling src:{}[port {}] dst:{}[port {}] added: {}",
882 new Object[] { srcNid, srcPort, dstNid, dstPort, added });
886 public void edgeUpdate(List<TopoEdgeUpdate> topoedgeupdateList) {
887 if (logger.isDebugEnabled()) {
888 for (TopoEdgeUpdate topoEdgeUpdate : topoedgeupdateList) {
889 Edge e = topoEdgeUpdate.getEdge();
890 Set<Property> p = topoEdgeUpdate.getProperty();
891 UpdateType type = topoEdgeUpdate.getUpdateType();
893 debugEdgeUpdate(e, type, p);
899 public void subnetNotify(Subnet sub, boolean add) {
900 logger.debug("Received subnet notification: {} add={}", sub, add);
902 for (Entry<InetAddress, ARPPending> entry : failedARPReqList.entrySet()) {
904 arphost = entry.getValue();
905 if (hostFinder == null) {
906 logger.warn("ARPHandler Services are not available on subnet addition");
909 logger.debug("Sending the ARP from FailedARPReqList fors IP: {}", arphost.getHostIP().getHostAddress());
910 hostFinder.find(arphost.getHostIP());
915 class OutStandingARPHandler extends TimerTask {
922 /* This routine runs every 4 seconds */
923 logger.trace("Number of Entries in ARP Pending/Failed Lists: ARPPendingList = {}, failedARPReqList = {}",
924 ARPPendingList.size(), failedARPReqList.size());
925 for (Entry<InetAddress, ARPPending> entry : ARPPendingList.entrySet()) {
926 arphost = entry.getValue();
928 if (hostsDB.containsKey(arphost.getHostIP())) {
929 // this host is already learned, shouldn't be in
931 // Remove it and continue
932 logger.warn("Learned Host {} found in ARPPendingList", arphost.getHostIP());
933 ARPPendingList.remove(entry.getKey());
936 if (arphost.getSent_count() < switchManager.getHostRetryCount()) {
938 * No reply has been received of first ARP Req, send the
939 * next one. Before sending the ARP, check if ARPHandler is
942 if (hostFinder == null) {
943 logger.warn("ARPHandler Services are not available for Outstanding ARPs");
946 hostFinder.find(arphost.getHostIP());
947 arphost.sent_count++;
948 logger.debug("ARP Sent from ARPPending List, IP: {}", arphost.getHostIP().getHostAddress());
949 } else if (arphost.getSent_count() >= switchManager.getHostRetryCount()) {
951 * ARP requests have been sent without receiving a reply,
952 * remove this from the pending list
954 ARPPendingList.remove(entry.getKey());
955 logger.debug("ARP reply not received after multiple attempts, removing from Pending List IP: {}",
956 arphost.getHostIP().getHostAddress());
958 * Add this host to a different list which will be processed
961 logger.debug("Adding the host to FailedARPReqList IP: {}", arphost.getHostIP().getHostAddress());
962 failedARPReqList.put(entry.getKey(), arphost);
965 logger.error("Inavlid arp_sent count for entry: {}", entry);
971 private class ARPRefreshHandler extends TimerTask {
977 if ((clusterContainerService != null) && !clusterContainerService.amICoordinator()) {
980 if ((switchManager != null) && !switchManager.isHostRefreshEnabled()) {
982 * The host probe procedure was disabled by CLI
986 if (hostsDB == null) {
987 /* hostsDB is not allocated yet */
988 logger.error("ARPRefreshHandler(): hostsDB is not allocated yet:");
991 for (Entry<InetAddress, HostNodeConnector> entry : hostsDB.entrySet()) {
992 HostNodeConnector host = entry.getValue();
993 if (host.isStaticHost()) {
994 /* this host was learned via API3, don't age it out */
998 short arp_cntdown = host.getArpSendCountDown();
1000 if (arp_cntdown > switchManager.getHostRetryCount()) {
1001 host.setArpSendCountDown(arp_cntdown);
1002 } else if (arp_cntdown <= 0) {
1004 * No ARP Reply received in last 2 minutes, remove this host
1005 * and inform applications
1007 removeKnownHost(entry.getKey());
1008 notifyHostLearnedOrRemoved(host, false);
1009 } else if (arp_cntdown <= switchManager.getHostRetryCount()) {
1011 * Use the services of arphandler to check if host is still
1014 if (logger.isTraceEnabled()) {
1016 "ARP Probing ({}) for {}({})",
1017 new Object[] { arp_cntdown, host.getNetworkAddress().getHostAddress(),
1018 HexEncode.bytesToHexString(host.getDataLayerAddressBytes()) });
1020 host.setArpSendCountDown(arp_cntdown);
1021 if (hostFinder == null) {
1023 * If hostfinder is not available, then can't send the
1024 * probe. However, continue the age out the hosts since
1025 * we don't know if the host is indeed out there or not.
1027 logger.trace("ARPHandler is not avaialable, can't send the probe");
1030 hostFinder.probe(host);
1037 * Inform the controller IP to MAC binding of a host and its connectivity to
1038 * an openflow switch in terms of Node, port, and VLAN.
1040 * @param networkAddr
1041 * IP address of the host
1043 * Address MAC address of the host
1045 * NodeConnector to which host is connected
1047 * Port of the switch to which host is connected
1049 * Vlan of which this host is member of
1051 * @return Status The status object as described in {@code Status}
1052 * indicating the result of this action.
1055 protected Status addStaticHostReq(InetAddress networkAddr, byte[] dataLayerAddress, NodeConnector nc, short vlan) {
1056 if (dataLayerAddress.length != NetUtils.MACAddrLengthInBytes) {
1057 return new Status(StatusCode.BADREQUEST, "Invalid MAC address");
1061 return new Status(StatusCode.BADREQUEST, "Invalid NodeConnector");
1063 HostNodeConnector host = null;
1065 host = new HostNodeConnector(dataLayerAddress, networkAddr, nc, vlan);
1066 if (hostExists(host)) {
1067 // This host is already learned either via ARP or through a
1068 // northbound request
1069 HostNodeConnector transHost = hostsDB.get(networkAddr);
1070 transHost.setStaticHost(true);
1071 return new Status(StatusCode.SUCCESS);
1074 if (hostsDB.get(networkAddr) != null) {
1075 // There is already a host with this IP address (but behind
1076 // a different (switch, port, vlan) tuple. Return an error
1077 return new Status(StatusCode.CONFLICT, "Host with this IP already exists.");
1079 host.setStaticHost(true);
1081 * Check if the nc is an ISL port
1083 if (topologyManager != null) {
1084 if (topologyManager.isInternal(nc)) {
1085 return new Status(StatusCode.BADREQUEST, "Cannot add host on ISL port");
1089 * Before adding host, Check if the switch and the port have already
1092 if (switchManager.isNodeConnectorEnabled(nc)) {
1094 processPendingARPReqs(networkAddr);
1095 notifyHostLearnedOrRemoved(host, true);
1097 inactiveStaticHosts.put(nc, host);
1098 logger.debug("Switch or switchport is not up, adding host {} to inactive list",
1099 networkAddr.getHostName());
1101 return new Status(StatusCode.SUCCESS);
1102 } catch (ConstructionException e) {
1103 logger.error("", e);
1104 return new Status(StatusCode.INTERNALERROR, "Host could not be created");
1110 * Update the controller IP to MAC binding of a host and its connectivity to
1111 * an openflow switch in terms of switch id, switch port, and VLAN.
1113 * @param networkAddr
1114 * IP address of the host
1116 * Address MAC address of the host
1118 * NodeConnector to which host is connected
1120 * Port of the switch to which host is connected
1122 * Vlan of which this host is member of
1124 * @return Status The status object as described in {@code Status}
1125 * indicating the result of this action.
1127 public Status updateHostReq(InetAddress networkAddr, byte[] dataLayerAddress, NodeConnector nc, short vlan) {
1128 HostNodeConnector tobeUpdatedHost;
1129 HostNodeConnector host = null;
1131 if (dataLayerAddress.length != NetUtils.MACAddrLengthInBytes) {
1132 return new Status(StatusCode.BADREQUEST, "Invalid MAC address");
1136 return new Status(StatusCode.BADREQUEST, "Invalid NodeConnector");
1140 host = new HostNodeConnector(dataLayerAddress, networkAddr, nc, vlan);
1141 if (hostExists(host)) {
1142 return new Status(StatusCode.BADREQUEST, "Host already exists");
1145 if ((tobeUpdatedHost = hostsDB.get(networkAddr)) != null) {
1146 if (hostsDB.replace(networkAddr, tobeUpdatedHost, host)) {
1147 logger.debug("Host replaced from hostsDB. Old host: {} New Host: {}", tobeUpdatedHost, host);
1148 notifyHostLearnedOrRemoved(tobeUpdatedHost, false);
1149 notifyHostLearnedOrRemoved(host, true);
1150 return new Status(StatusCode.SUCCESS);
1152 logger.error("Static host replacement failed from hostsDB, Replaced Host: {}, New Host: {}",
1153 tobeUpdatedHost, host);
1154 return new Status(StatusCode.INTERNALERROR,
1155 "Host Replacement Failed due to presence of another host with same IP");
1159 // Check if the host exists in inactive hosts database
1160 if ((tobeUpdatedHost = inactiveStaticHosts.get(nc)) != null) {
1161 if (inactiveStaticHosts.replace(nc, tobeUpdatedHost, host)) {
1162 logger.debug("Host replaced from inactive hostsDB. Old host: {} New Host: {}", tobeUpdatedHost,
1164 return new Status(StatusCode.SUCCESS);
1166 logger.error("Static host replacement failed, Replaced Host: {}, New Host: {}", tobeUpdatedHost,
1168 return new Status(StatusCode.INTERNALERROR,
1169 "Host Replacement Failed due to presence of another host with same IP");
1173 // Host doesn't exist
1174 return new Status(StatusCode.BADREQUEST, "Host doesn't exists, can't update");
1175 } catch (ConstructionException e) {
1176 logger.error("", e);
1177 return new Status(StatusCode.INTERNALERROR, "host object creation failure");
1182 * Remove from the controller IP to MAC binding of a host and its
1183 * connectivity to an openflow switch
1185 * @param networkAddr
1186 * IP address of the host
1188 * @return boolean true if the host was removed successfully, false
1192 public Status removeStaticHostReq(InetAddress networkAddress) {
1193 // Check if host is in active hosts database
1194 HostNodeConnector host = getHostFromOnActiveDB(networkAddress);
1197 if (!host.isStaticHost()) {
1198 return new Status(StatusCode.FORBIDDEN, "Host " + networkAddress.getHostName() + " is not static");
1200 // Remove and notify
1201 notifyHostLearnedOrRemoved(host, false);
1202 removeKnownHost(networkAddress);
1203 return new Status(StatusCode.SUCCESS, null);
1206 // Check if host is in inactive hosts database
1207 Entry<NodeConnector, HostNodeConnector> entry = getHostFromInactiveDB(networkAddress);
1208 if (entry != null) {
1209 host = entry.getValue();
1211 if (!host.isStaticHost()) {
1212 return new Status(StatusCode.FORBIDDEN, "Host " + networkAddress.getHostName() + " is not static");
1214 this.removeHostFromInactiveDB(networkAddress);
1215 return new Status(StatusCode.SUCCESS, null);
1218 // Host is neither in active nor inactive hosts database
1219 return new Status(StatusCode.NOTFOUND, "Host does not exist");
1223 public void modeChangeNotify(Node node, boolean proactive) {
1224 logger.debug("Set Switch {} Mode to {}", node.getID(), proactive);
1228 public void notifyNode(Node node, UpdateType type, Map<String, Property> propMap) {
1235 logger.debug("Received removed node {}", node);
1236 for (Entry<InetAddress, HostNodeConnector> entry : hostsDB.entrySet()) {
1237 HostNodeConnector host = entry.getValue();
1238 if (host.getnodeconnectorNode().equals(node)) {
1239 logger.debug("Node: {} is down, remove from Hosts_DB", node);
1240 removeKnownHost(entry.getKey());
1241 notifyHostLearnedOrRemoved(host, false);
1251 public void notifyNodeConnector(NodeConnector nodeConnector, UpdateType type, Map<String, Property> propMap) {
1252 if (nodeConnector == null) {
1264 State state = (State) propMap.get(State.StatePropName);
1265 if ((state != null) && (state.getValue() == State.EDGE_UP)) {
1274 handleNodeConnectorStatusUp(nodeConnector);
1276 handleNodeConnectorStatusDown(nodeConnector);
1281 public Status addStaticHost(String networkAddress, String dataLayerAddress, NodeConnector nc, String vlan) {
1283 InetAddress ip = InetAddress.getByName(networkAddress);
1285 if (vlan != null && !vlan.isEmpty()) {
1286 vl = Short.decode(vlan);
1287 if (vl < 1 || vl > 4095) {
1288 return new Status(StatusCode.BADREQUEST, "Host vlan out of range [1 - 4095]");
1292 return addStaticHostReq(ip, HexEncode.bytesFromHexString(dataLayerAddress), nc, vl);
1294 } catch (UnknownHostException e) {
1295 logger.debug("Invalid host IP specified when adding static host", e);
1296 return new Status(StatusCode.BADREQUEST, "Invalid Host IP Address");
1297 } catch (NumberFormatException nfe) {
1298 logger.debug("Invalid host vlan or MAC specified when adding static host", nfe);
1299 return new Status(StatusCode.BADREQUEST, "Invalid Host vLan/MAC");
1304 public Status removeStaticHost(String networkAddress) {
1306 InetAddress address = InetAddress.getByName(networkAddress);
1307 return removeStaticHostReq(address);
1308 } catch (UnknownHostException e) {
1309 logger.debug("Invalid IP Address when trying to remove host", e);
1310 return new Status(StatusCode.BADREQUEST, "Invalid IP Address when trying to remove host");
1314 private void handleNodeConnectorStatusUp(NodeConnector nodeConnector) {
1316 HostNodeConnector host = null;
1318 logger.trace("handleNodeConnectorStatusUp {}", nodeConnector);
1320 for (Entry<InetAddress, ARPPending> entry : failedARPReqList.entrySet()) {
1321 arphost = entry.getValue();
1322 logger.trace("Sending the ARP from FailedARPReqList fors IP: {}", arphost.getHostIP().getHostAddress());
1323 if (hostFinder == null) {
1324 logger.warn("ARPHandler is not available at interface up");
1325 logger.warn("Since this event is missed, host(s) connected to interface {} may not be discovered",
1330 // Send a broadcast ARP only on the interface which just came up.
1331 // Use hostFinder's "probe" method
1333 byte[] dataLayerAddress = NetUtils.getBroadcastMACAddr();
1334 host = new HostNodeConnector(dataLayerAddress, arphost.getHostIP(), nodeConnector, (short) 0);
1335 hostFinder.probe(host);
1336 } catch (ConstructionException e) {
1337 logger.debug("HostNodeConnector couldn't be created for Host: {}, NodeConnector: {}",
1338 arphost.getHostIP(), nodeConnector);
1339 logger.error("", e);
1343 host = inactiveStaticHosts.get(nodeConnector);
1345 inactiveStaticHosts.remove(nodeConnector);
1347 processPendingARPReqs(host.getNetworkAddress());
1348 notifyHostLearnedOrRemoved(host, true);
1352 private void handleNodeConnectorStatusDown(NodeConnector nodeConnector) {
1353 logger.trace("handleNodeConnectorStatusDown {}", nodeConnector);
1355 for (Entry<InetAddress, HostNodeConnector> entry : hostsDB.entrySet()) {
1356 HostNodeConnector host = entry.getValue();
1357 if (host.getnodeConnector().equals(nodeConnector)) {
1358 logger.debug(" NodeConnector: {} is down, remove from Hosts_DB", nodeConnector);
1359 removeKnownHost(entry.getKey());
1360 notifyHostLearnedOrRemoved(host, false);
1365 void setClusterContainerService(IClusterContainerServices s) {
1366 logger.debug("Cluster Service set");
1367 this.clusterContainerService = s;
1370 void unsetClusterContainerService(IClusterContainerServices s) {
1371 if (this.clusterContainerService == s) {
1372 logger.debug("Cluster Service removed!");
1373 this.clusterContainerService = null;
1377 void setSwitchManager(ISwitchManager s) {
1378 logger.debug("SwitchManager set");
1379 this.switchManager = s;
1382 void unsetSwitchManager(ISwitchManager s) {
1383 if (this.switchManager == s) {
1384 logger.debug("SwitchManager removed!");
1385 this.switchManager = null;
1389 public String getContainerName() {
1390 if (containerName == null) {
1391 return GlobalConstants.DEFAULT.toString();
1393 return containerName;
1397 * Function called by the dependency manager when all the required
1398 * dependencies are satisfied
1401 void init(Component c) {
1402 Dictionary<?, ?> props = c.getServiceProperties();
1403 if (props != null) {
1404 this.containerName = (String) props.get("containerName");
1405 logger.debug("Running containerName: {}", this.containerName);
1407 // In the Global instance case the containerName is empty
1408 this.containerName = "";
1414 * Function called by the dependency manager when at least one dependency
1415 * become unsatisfied or when the component is shutting down because for
1416 * example bundle is being stopped.
1423 * Function called by dependency manager after "init ()" is called and after
1424 * the services provided by the class are registered in the service registry
1428 registerWithOSGIConsole();
1432 * Function called by the dependency manager before the services exported by
1433 * the component are unregistered, this will be followed by a "destroy ()"
1442 arpRefreshTimer.cancel();
1444 executor.shutdownNow();
1448 public void edgeOverUtilized(Edge edge) {
1453 public void edgeUtilBackToNormal(Edge edge) {
1458 public void entryCreated(InetAddress key, String cacheName, boolean originLocal) {
1462 processPendingARPReqs(key);
1466 public void entryUpdated(InetAddress key, HostNodeConnector new_value, String cacheName, boolean originLocal) {
1470 public void entryDeleted(InetAddress key, String cacheName, boolean originLocal) {
1473 private void registerWithOSGIConsole() {
1474 BundleContext bundleContext = FrameworkUtil.getBundle(this.getClass()).getBundleContext();
1475 bundleContext.registerService(CommandProvider.class.getName(), this, null);
1479 public String getHelp() {
1483 public void _dumpPendingARPReqList(CommandInterpreter ci) {
1485 for (Entry<InetAddress, ARPPending> entry : ARPPendingList.entrySet()) {
1486 arphost = entry.getValue();
1487 ci.println(arphost.getHostIP().toString());
1491 public void _dumpFailedARPReqList(CommandInterpreter ci) {
1493 for (Entry<InetAddress, ARPPending> entry : failedARPReqList.entrySet()) {
1494 arphost = entry.getValue();
1495 ci.println(arphost.getHostIP().toString());