2 * Copyright (c) 2015 Brocade Communications 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
8 package org.opendaylight.ovsdb.openstack.netvirt.providers.openflow13.services.arp;
10 import com.google.common.base.Preconditions;
11 import com.google.common.collect.ImmutableList;
12 import com.google.common.util.concurrent.FutureCallback;
13 import com.google.common.util.concurrent.Futures;
14 import com.google.common.util.concurrent.JdkFutureAdapters;
15 import com.google.common.util.concurrent.ListenableFuture;
16 import com.google.common.util.concurrent.ListeningExecutorService;
17 import com.google.common.util.concurrent.MoreExecutors;
18 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
19 import org.opendaylight.openflowplugin.api.OFConstants;
20 import org.opendaylight.ovsdb.openstack.netvirt.api.ConfigurationService;
21 import org.opendaylight.ovsdb.openstack.netvirt.api.GatewayMacResolver;
22 import org.opendaylight.ovsdb.openstack.netvirt.api.GatewayMacResolverListener;
23 import org.opendaylight.ovsdb.openstack.netvirt.api.NodeCacheManager;
24 import org.opendaylight.ovsdb.openstack.netvirt.providers.ConfigInterface;
25 import org.opendaylight.ovsdb.openstack.netvirt.providers.NetvirtProvidersProvider;
26 import org.opendaylight.ovsdb.openstack.netvirt.providers.openflow13.AbstractServiceInstance;
27 import org.opendaylight.ovsdb.openstack.netvirt.providers.openflow13.Service;
28 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
29 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.MacAddress;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowId;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.Table;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.TableKey;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowBuilder;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.FlowKey;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.AddFlowInputBuilder;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.AddFlowOutput;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.RemoveFlowInputBuilder;
40 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SalFlowService;
41 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.FlowCookie;
42 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.FlowModFlags;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.FlowRef;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.InstructionsBuilder;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.Match;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.flow.MatchBuilder;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.instruction.ApplyActionsCaseBuilder;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.instruction.apply.actions._case.ApplyActions;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.instruction.apply.actions._case.ApplyActionsBuilder;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.Instruction;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.instruction.list.InstructionBuilder;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeRef;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnectorKey;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.EthernetMatch;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.ArpMatch;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketProcessingListener;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketProcessingService;
62 import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
63 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
64 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
65 import org.opendaylight.yangtools.yang.common.RpcResult;
66 import org.osgi.framework.BundleContext;
67 import org.osgi.framework.ServiceReference;
68 import org.slf4j.Logger;
69 import org.slf4j.LoggerFactory;
71 import java.math.BigInteger;
72 import java.util.Collections;
73 import java.util.List;
74 import java.util.Map.Entry;
75 import java.util.concurrent.Callable;
76 import java.util.concurrent.ConcurrentHashMap;
77 import java.util.concurrent.ConcurrentMap;
78 import java.util.concurrent.Executors;
79 import java.util.concurrent.Future;
80 import java.util.concurrent.ScheduledExecutorService;
81 import java.util.concurrent.TimeUnit;
82 import java.util.concurrent.atomic.AtomicBoolean;
83 import java.util.concurrent.atomic.AtomicLong;
85 import static com.google.common.base.Preconditions.checkNotNull;
89 * @author Anil Vishnoi (avishnoi@Brocade.com)
92 public class GatewayMacResolverService extends AbstractServiceInstance
93 implements ConfigInterface, GatewayMacResolver,PacketProcessingListener {
95 private static final Logger LOG = LoggerFactory.getLogger(GatewayMacResolverService.class);
96 private static final String ARP_REPLY_TO_CONTROLLER_FLOW_NAME = "GatewayArpReplyRouter";
97 private static final int ARP_REPLY_TO_CONTROLLER_FLOW_PRIORITY = 10000;
98 private static final Instruction SEND_TO_CONTROLLER_INSTRUCTION;
99 private ArpSender arpSender;
100 private SalFlowService flowService;
101 private final AtomicLong flowCookie = new AtomicLong();
102 private final ConcurrentMap<Ipv4Address, ArpResolverMetadata> gatewayToArpMetadataMap =
103 new ConcurrentHashMap<>();
104 private static final int ARP_WATCH_BROTHERS = 10;
105 private static final int WAIT_CYCLES = 3;
106 private static final int PER_CYCLE_WAIT_DURATION = 1000;
107 private static final int REFRESH_INTERVAL = 10;
108 private final ListeningExecutorService arpWatcherWall = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(ARP_WATCH_BROTHERS));
109 private final ScheduledExecutorService gatewayMacRefresherPool = Executors.newScheduledThreadPool(1);
110 private final ScheduledExecutorService refreshRequester = Executors.newSingleThreadScheduledExecutor();
111 private AtomicBoolean initializationDone = new AtomicBoolean(false);
112 private volatile ConfigurationService configurationService;
113 private volatile NodeCacheManager nodeCacheManager;
116 ApplyActions applyActions = new ApplyActionsBuilder().setAction(
117 ImmutableList.of(ArpFlowFactory.createSendToControllerAction(0))).build();
118 SEND_TO_CONTROLLER_INSTRUCTION = new InstructionBuilder().setOrder(0)
119 .setInstruction(new ApplyActionsCaseBuilder().setApplyActions(applyActions).build())
123 public GatewayMacResolverService(){
124 super(Service.GATEWAY_RESOLVER);
127 public GatewayMacResolverService(Service service){
132 if(!initializationDone.get()){
133 initializationDone.set(true);
134 ProviderContext providerContext = NetvirtProvidersProvider.getProviderContext();
135 checkNotNull(providerContext);
136 PacketProcessingService packetProcessingService = providerContext.getRpcService(PacketProcessingService.class);
137 if (packetProcessingService != null) {
138 LOG.debug("{} was found.", PacketProcessingService.class.getSimpleName());
139 this.arpSender = new ArpSender(packetProcessingService);
141 LOG.error("Missing service {}", PacketProcessingService.class.getSimpleName());
142 this.arpSender = null;
144 flowService = providerContext.getRpcService(SalFlowService.class);
145 refreshRequester.scheduleWithFixedDelay(new Runnable(){
149 if (!gatewayToArpMetadataMap.isEmpty()){
150 for(final Entry<Ipv4Address, ArpResolverMetadata> gatewayToArpMetadataEntry : gatewayToArpMetadataMap.entrySet()){
151 final Ipv4Address gatewayIp = gatewayToArpMetadataEntry.getKey();
152 final ArpResolverMetadata gatewayMetaData =
153 checkAndGetExternalBridgeDpid(
154 resetFlowToRemove(gatewayIp, gatewayToArpMetadataEntry.getValue()));
155 gatewayMacRefresherPool.schedule(new Runnable(){
160 final Node externalNetworkBridge = getExternalBridge(gatewayMetaData.getExternalNetworkBridgeDpid());
161 if(externalNetworkBridge == null){
162 LOG.error("MAC address for gateway {} can not be resolved, because external bridge {} "
163 + "is not connected to controller.",
164 gatewayIp.getValue(),
165 gatewayMetaData.getExternalNetworkBridgeDpid() );
167 LOG.debug("Refresh Gateway Mac for gateway {} using source ip {} and mac {} for ARP request",
168 gatewayIp.getValue(),gatewayMetaData.getArpRequestSourceIp().getValue(),gatewayMetaData.getArpRequestSourceMacAddress().getValue());
170 sendGatewayArpRequest(externalNetworkBridge,gatewayIp,gatewayMetaData.getArpRequestSourceIp(), gatewayMetaData.getArpRequestSourceMacAddress());
173 }, 1, TimeUnit.SECONDS);
177 }, REFRESH_INTERVAL, REFRESH_INTERVAL, TimeUnit.SECONDS);
181 * Method do following actions:
182 * 1. Install flow to direct ARP response packet to controller
183 * 2. Send ARP request packet out on all port of the given External network bridge.
184 * 3. Cache the flow that need to be removed once ARP resolution is done.
185 * 4. Return listenable future so that user can add callback to get the MacAddress
186 * @param externalNetworkBridgeDpid Broadcast ARP request packet on this bridge
187 * @param gatewayIp IP address for which MAC need to be resolved
188 * @param sourceIpAddress Source Ip address for the ARP request packet
189 * @param sourceMacAddress Source Mac address for the ARP request packet
190 * @param periodicRefresh Enable/Disable periodic refresh of the Gateway Mac address
191 * @return Future object
194 public ListenableFuture<MacAddress> resolveMacAddress(
195 final GatewayMacResolverListener gatewayMacResolverListener, final Long externalNetworkBridgeDpid,
196 final Boolean refreshExternalNetworkBridgeDpidIfNeeded,
197 final Ipv4Address gatewayIp, final Ipv4Address sourceIpAddress, final MacAddress sourceMacAddress,
198 final Boolean periodicRefresh){
199 Preconditions.checkNotNull(refreshExternalNetworkBridgeDpidIfNeeded);
200 Preconditions.checkNotNull(sourceIpAddress);
201 Preconditions.checkNotNull(sourceMacAddress);
202 Preconditions.checkNotNull(gatewayIp);
204 LOG.info("Trigger Mac resolution for gateway {}, using source ip {} and mac {}",
205 gatewayIp.getValue(),sourceIpAddress.getValue(),sourceMacAddress.getValue());
208 if(gatewayToArpMetadataMap.containsKey(gatewayIp)){
209 if(gatewayToArpMetadataMap.get(gatewayIp).getGatewayMacAddress() != null){
210 return arpWatcherWall.submit(new Callable<MacAddress>(){
213 public MacAddress call() throws Exception {
214 return gatewayToArpMetadataMap.get(gatewayIp).getGatewayMacAddress();
219 gatewayToArpMetadataMap.put(gatewayIp,new ArpResolverMetadata(gatewayMacResolverListener,
220 externalNetworkBridgeDpid, refreshExternalNetworkBridgeDpidIfNeeded,
221 gatewayIp, sourceIpAddress, sourceMacAddress, periodicRefresh));
225 final Node externalNetworkBridge = getExternalBridge(externalNetworkBridgeDpid);
226 if (externalNetworkBridge == null) {
227 if (!refreshExternalNetworkBridgeDpidIfNeeded) {
228 LOG.error("MAC address for gateway {} can not be resolved, because external bridge {} "
229 + "is not connected to controller.", gatewayIp.getValue(), externalNetworkBridgeDpid);
231 LOG.debug("MAC address for gateway {} can not be resolved, since dpid was not refreshed yet",
232 gatewayIp.getValue());
237 sendGatewayArpRequest(externalNetworkBridge,gatewayIp,sourceIpAddress, sourceMacAddress);
239 //Wait for MacAddress population in cache
240 return waitForMacAddress(gatewayIp);
243 private Node getExternalBridge(final Long externalNetworkBridgeDpid){
244 if (externalNetworkBridgeDpid != null) {
245 final String nodeName = OPENFLOW + externalNetworkBridgeDpid;
246 return getOpenFlowNode(nodeName);
251 private ArpResolverMetadata checkAndGetExternalBridgeDpid(ArpResolverMetadata gatewayMetaData) {
252 final Long origDpid = gatewayMetaData.getExternalNetworkBridgeDpid();
254 // If we are not allowing dpid to change, there is nothing further to do here
255 if (!gatewayMetaData.isRefreshExternalNetworkBridgeDpidIfNeeded()) {
256 return gatewayMetaData;
259 // If current dpid is null, or if mac is not getting resolved, make an attempt to
260 // grab a different dpid, so a different (or updated) external bridge gets used
261 if (origDpid == null || !gatewayMetaData.isGatewayMacAddressResolved()) {
262 Long newDpid = getAnotherExternalBridgeDpid(origDpid);
263 gatewayMetaData.setExternalNetworkBridgeDpid(newDpid);
266 return gatewayMetaData;
269 private Long getAnotherExternalBridgeDpid(final Long unwantedDpid) {
270 LOG.trace("Being asked to find a new dpid. unwantedDpid:{} cachemanager:{} configurationService:{}",
271 unwantedDpid, nodeCacheManager, configurationService);
273 if (nodeCacheManager == null) {
274 LOG.error("Unable to find external dpid to use for resolver: no nodeCacheManager");
277 if (configurationService == null) {
278 LOG.error("Unable to find external dpid to use for resolver: no configurationService");
282 // Pickup another dpid in list that is different than the unwanted one provided and is in the
283 // operational tree. If none can be found, return the provided dpid as a last resort.
284 // NOTE: We are assuming that all the br-ex are serving one external network and gateway ip of
285 // the external network is reachable from every br-ex
286 // TODO: Consider other deployment scenario, and think of another solution.
287 List<Long> dpids = nodeCacheManager.getBridgeDpids(configurationService.getExternalBridgeName());
288 Collections.shuffle(dpids);
289 for (Long dpid : dpids) {
290 if (dpid == null || dpid.equals(unwantedDpid) || getExternalBridge(dpid) == null) {
294 LOG.debug("Gateway Mac Resolver Service will use dpid {}", dpid);
298 LOG.warn("Unable to find usable external dpid for resolver. Best choice is still {}", unwantedDpid);
302 private void sendGatewayArpRequest(final Node externalNetworkBridge,final Ipv4Address gatewayIp,
303 final Ipv4Address sourceIpAddress, final MacAddress sourceMacAddress){
304 final ArpMessageAddress senderAddress = new ArpMessageAddress(sourceMacAddress,sourceIpAddress);
306 //Build arp reply router flow
307 final Flow arpReplyToControllerFlow = createArpReplyToControllerFlow(senderAddress, gatewayIp);
309 final InstanceIdentifier<Node> nodeIid = InstanceIdentifier.builder(Nodes.class)
310 .child(Node.class, externalNetworkBridge.getKey())
312 final InstanceIdentifier<Flow> flowIid = createFlowIid(arpReplyToControllerFlow, nodeIid);
313 final NodeRef nodeRef = new NodeRef(nodeIid);
316 Future<RpcResult<AddFlowOutput>> addFlowResult = flowService.addFlow(new AddFlowInputBuilder(
317 arpReplyToControllerFlow).setFlowRef(new FlowRef(flowIid)).setNode(nodeRef).build());
318 //wait for flow installation
319 Futures.addCallback(JdkFutureAdapters.listenInPoolThread(addFlowResult),
320 new FutureCallback<RpcResult<AddFlowOutput>>() {
323 public void onSuccess(RpcResult<AddFlowOutput> result) {
324 if (!result.isSuccessful()) {
325 LOG.warn("Flow to route ARP Reply to Controller is not installed successfully : {} \nErrors: {}", flowIid,result.getErrors());
328 LOG.debug("Flow to route ARP Reply to Controller installed successfully : {}", flowIid);
330 ArpResolverMetadata gatewayArpMetadata = gatewayToArpMetadataMap.get(gatewayIp);
331 if (gatewayArpMetadata == null) {
332 LOG.warn("No metadata found for gatewayIp: {}", gatewayIp);
337 gatewayArpMetadata.setFlowToRemove(new RemoveFlowInputBuilder(arpReplyToControllerFlow).setNode(nodeRef).build());
339 //get MAC DA for ARP packets
340 MacAddress arpRequestDestMacAddress = gatewayArpMetadata.getArpRequestDestMacAddress();
342 //Send ARP request packets
343 for (NodeConnector egressNc : externalNetworkBridge.getNodeConnector()) {
344 KeyedInstanceIdentifier<NodeConnector, NodeConnectorKey> egressNcIid = nodeIid.child(
345 NodeConnector.class, new NodeConnectorKey(egressNc.getId()));
346 ListenableFuture<RpcResult<Void>> futureSendArpResult = arpSender.sendArp(
347 senderAddress, gatewayIp, arpRequestDestMacAddress, egressNcIid);
348 Futures.addCallback(futureSendArpResult, logResult(gatewayIp, egressNcIid));
353 public void onFailure(Throwable t) {
354 LOG.warn("ARP Reply to Controller flow was not created: {}", flowIid, t);
360 private ListenableFuture<MacAddress> waitForMacAddress(final Ipv4Address gatewayIp){
362 return arpWatcherWall.submit(new Callable<MacAddress>(){
365 public MacAddress call() throws Exception {
366 for(int cycle = 0;cycle < WAIT_CYCLES;cycle++){
367 //Sleep before checking mac address, so meanwhile ARP request packets
368 // will be broadcasted on the bridge.
369 Thread.sleep(PER_CYCLE_WAIT_DURATION);
370 ArpResolverMetadata arpResolverMetadata = gatewayToArpMetadataMap.get(gatewayIp);
371 if(arpResolverMetadata != null && arpResolverMetadata.getGatewayMacAddress() != null){
372 if(!arpResolverMetadata.isPeriodicRefresh()){
373 resetFlowToRemove(gatewayIp, arpResolverMetadata);
374 return gatewayToArpMetadataMap.remove(gatewayIp).getGatewayMacAddress();
376 return arpResolverMetadata.getGatewayMacAddress();
384 private Flow createArpReplyToControllerFlow(final ArpMessageAddress senderAddress, final Ipv4Address ipForRequestedMac) {
385 checkNotNull(senderAddress);
386 checkNotNull(ipForRequestedMac);
387 FlowBuilder arpFlow = new FlowBuilder().setTableId(Service.CLASSIFIER.getTable())
388 .setFlowName(ARP_REPLY_TO_CONTROLLER_FLOW_NAME)
389 .setPriority(ARP_REPLY_TO_CONTROLLER_FLOW_PRIORITY)
390 .setBufferId(OFConstants.OFP_NO_BUFFER)
393 .setCookie(new FlowCookie(BigInteger.valueOf(flowCookie.incrementAndGet())))
394 .setFlags(new FlowModFlags(false, false, false, false, false));
396 EthernetMatch ethernetMatch = ArpFlowFactory.createEthernetMatch(senderAddress.getHardwareAddress());
397 ArpMatch arpMatch = ArpFlowFactory.createArpMatch(senderAddress, ipForRequestedMac);
398 Match match = new MatchBuilder().setEthernetMatch(ethernetMatch).setLayer3Match(arpMatch).build();
399 arpFlow.setMatch(match);
400 arpFlow.setInstructions(new InstructionsBuilder().setInstruction(
401 ImmutableList.of(SEND_TO_CONTROLLER_INSTRUCTION)).build());
402 arpFlow.setId(createFlowId(ipForRequestedMac));
403 return arpFlow.build();
406 private FlowId createFlowId(Ipv4Address ipForRequestedMac) {
407 String flowId = ARP_REPLY_TO_CONTROLLER_FLOW_NAME + "|" + ipForRequestedMac.getValue();
408 return new FlowId(flowId);
411 private static InstanceIdentifier<Flow> createFlowIid(Flow flow, InstanceIdentifier<Node> nodeIid) {
412 return nodeIid.builder()
413 .augmentation(FlowCapableNode.class)
414 .child(Table.class, new TableKey(flow.getTableId()))
415 .child(Flow.class, new FlowKey(flow.getId()))
419 private FutureCallback<RpcResult<Void>> logResult(final Ipv4Address tpa,
420 final KeyedInstanceIdentifier<NodeConnector, NodeConnectorKey> egressNcIid) {
421 return new FutureCallback<RpcResult<Void>>() {
424 public void onSuccess(RpcResult<Void> result) {
425 LOG.debug("ARP Request for IP {} was sent from {}.", tpa.getValue(), egressNcIid);
429 public void onFailure(Throwable t) {
430 LOG.warn("ARP Request for IP {} was NOT sent from {}.", tpa.getValue(), egressNcIid);
436 public void onPacketReceived(PacketReceived potentialArp) {
437 Arp arp = ArpResolverUtils.getArpFrom(potentialArp);
439 if (arp.getOperation() != ArpOperation.REPLY.intValue()) {
440 LOG.trace("Packet is not ARP REPLY packet.");
443 if (LOG.isTraceEnabled()) {
444 LOG.trace("ARP REPLY received - {}", ArpUtils.getArpToStringFormat(arp));
446 NodeKey nodeKey = potentialArp.getIngress().getValue().firstKeyOf(Node.class, NodeKey.class);
447 if (nodeKey == null) {
448 LOG.info("Unknown source node of ARP packet: {}", potentialArp);
451 Ipv4Address gatewayIpAddress = ArpUtils.bytesToIp(arp.getSenderProtocolAddress());
452 MacAddress gatewayMacAddress = ArpUtils.bytesToMac(arp.getSenderHardwareAddress());
453 ArpResolverMetadata candidateGatewayIp = gatewayToArpMetadataMap.get(gatewayIpAddress);
454 if(candidateGatewayIp != null){
455 LOG.debug("Resolved MAC for Gateway Ip {} is {}",gatewayIpAddress.getValue(),gatewayMacAddress.getValue());
456 candidateGatewayIp.setGatewayMacAddress(gatewayMacAddress);
457 resetFlowToRemove(gatewayIpAddress, candidateGatewayIp);
463 public void setDependencies(BundleContext bundleContext,
464 ServiceReference serviceReference) {
465 super.setDependencies(bundleContext.getServiceReference(GatewayMacResolver.class.getName()), this);
470 public void setDependencies(Object impl) {
471 if (impl instanceof NodeCacheManager) {
472 nodeCacheManager = (NodeCacheManager) impl;
473 } else if (impl instanceof ConfigurationService) {
474 configurationService = (ConfigurationService) impl;
479 public void stopPeriodicRefresh(Ipv4Address gatewayIp) {
481 resetFlowToRemove(gatewayIp, null);
482 gatewayToArpMetadataMap.remove(gatewayIp);
485 private ArpResolverMetadata resetFlowToRemove(
486 final Ipv4Address gatewayIp, ArpResolverMetadata gatewayArpMetadata) {
487 checkNotNull(gatewayIp);
489 // If gatewayArpMetadata was not provided, look it up
490 if (gatewayArpMetadata == null) {
491 gatewayArpMetadata = gatewayToArpMetadataMap.get(gatewayIp);
493 if (gatewayArpMetadata != null && gatewayArpMetadata.getFlowToRemove() != null) {
494 LOG.debug("Flow to route ARP Reply to Controller from {} being removed from node {}",
495 gatewayIp, gatewayArpMetadata.getFlowToRemove().getNode());
496 flowService.removeFlow(gatewayArpMetadata.getFlowToRemove());
497 gatewayArpMetadata.setFlowToRemove(null);
499 return gatewayArpMetadata;