2 * Copyright (c) 2014 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
8 package org.opendaylight.protocol.bgp.rib.impl;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.MoreObjects;
13 import com.google.common.base.Stopwatch;
14 import com.google.common.cache.CacheBuilder;
15 import com.google.common.cache.CacheLoader;
16 import com.google.common.cache.LoadingCache;
17 import com.google.common.collect.ImmutableMap;
18 import com.google.common.collect.ImmutableSet;
19 import com.google.common.collect.Sets;
20 import com.google.common.net.InetAddresses;
21 import com.google.common.util.concurrent.FluentFuture;
22 import com.google.common.util.concurrent.Futures;
23 import com.google.common.util.concurrent.ListenableFuture;
24 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
25 import java.util.ArrayList;
26 import java.util.Collections;
27 import java.util.HashMap;
28 import java.util.HashSet;
29 import java.util.List;
31 import java.util.Objects;
32 import java.util.Optional;
34 import java.util.concurrent.TimeUnit;
35 import java.util.stream.Collectors;
36 import org.checkerframework.checker.lock.qual.GuardedBy;
37 import org.checkerframework.checker.lock.qual.Holding;
38 import org.opendaylight.mdsal.binding.api.RpcProviderService;
39 import org.opendaylight.mdsal.binding.api.Transaction;
40 import org.opendaylight.mdsal.binding.api.TransactionChain;
41 import org.opendaylight.mdsal.common.api.CommitInfo;
42 import org.opendaylight.mdsal.dom.api.DOMDataTreeTransaction;
43 import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
44 import org.opendaylight.protocol.bgp.openconfig.spi.BGPTableTypeRegistryConsumer;
45 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
46 import org.opendaylight.protocol.bgp.parser.BGPError;
47 import org.opendaylight.protocol.bgp.parser.impl.message.update.LocalPreferenceAttributeParser;
48 import org.opendaylight.protocol.bgp.parser.spi.MessageUtil;
49 import org.opendaylight.protocol.bgp.parser.spi.RevisedErrorHandlingSupport;
50 import org.opendaylight.protocol.bgp.rib.impl.config.BgpPeer;
51 import org.opendaylight.protocol.bgp.rib.impl.config.GracefulRestartUtil;
52 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionPreferences;
53 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
54 import org.opendaylight.protocol.bgp.rib.impl.state.BGPSessionStateProvider;
55 import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
56 import org.opendaylight.protocol.bgp.rib.spi.BGPSessionListener;
57 import org.opendaylight.protocol.bgp.rib.spi.BGPTerminationReason;
58 import org.opendaylight.protocol.bgp.rib.spi.RIBSupport;
59 import org.opendaylight.protocol.bgp.rib.spi.RouterIds;
60 import org.opendaylight.protocol.bgp.rib.spi.state.BGPSessionState;
61 import org.opendaylight.protocol.bgp.rib.spi.state.BGPTimersState;
62 import org.opendaylight.protocol.bgp.rib.spi.state.BGPTransportState;
63 import org.opendaylight.protocol.util.Ipv4Util;
64 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.AsNumber;
65 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressNoZone;
66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.DestinationIpv4Builder;
67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv4CaseBuilder;
70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.Update;
71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.BgpParameters;
72 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.Attributes;
73 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.AttributesBuilder;
74 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.update.message.Nlri;
75 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.BgpAddPathTableType;
76 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.BgpTableType;
77 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.RouteRefresh;
78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.SendReceive;
79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp.capabilities.GracefulRestartCapability;
80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp.capabilities.add.path.capability.AddressFamilies;
81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpReachNlri;
82 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpReachNlriBuilder;
83 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpUnreachNlri;
84 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpUnreachNlriBuilder;
85 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
86 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
87 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.peer.rpc.rev180329.BgpPeerRpcService;
88 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.PeerRole;
89 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib.PeerKey;
90 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib.peer.AdjRibOut;
91 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.Tables;
92 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.TablesKey;
93 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.AddressFamily;
94 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.ClusterIdentifier;
95 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv4AddressFamily;
96 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.RouteTarget;
97 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.SubsequentAddressFamily;
98 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.UnicastSubsequentAddressFamily;
99 import org.opendaylight.yangtools.concepts.ObjectRegistration;
100 import org.opendaylight.yangtools.concepts.Registration;
101 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
102 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
103 import org.opendaylight.yangtools.yang.binding.Notification;
104 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
105 import org.slf4j.Logger;
106 import org.slf4j.LoggerFactory;
109 * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
112 public class BGPPeer extends AbstractPeer implements BGPSessionListener {
113 private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
114 private static final TablesKey IPV4_UCAST_TABLE_KEY = new TablesKey(Ipv4AddressFamily.class,
115 UnicastSubsequentAddressFamily.class);
117 private ImmutableSet<TablesKey> tables = ImmutableSet.of();
118 private final RIB rib;
119 private final Map<TablesKey, AdjRibOutListener> adjRibOutListenerSet = new HashMap<>();
120 private final List<RouteTarget> rtMemberships = new ArrayList<>();
121 private final RpcProviderService rpcRegistry;
122 private final BGPTableTypeRegistryConsumer tableTypeRegistry;
123 private final BgpPeer bgpPeer;
124 private InstanceIdentifier<AdjRibOut> peerRibOutIId;
125 private KeyedInstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib
126 .rev180329.bgp.rib.rib.Peer, PeerKey> peerIId;
128 private Registration trackerRegistration;
129 private final LoadingCache<TablesKey, KeyedInstanceIdentifier<Tables, TablesKey>> tablesIId
130 = CacheBuilder.newBuilder()
131 .build(new CacheLoader<TablesKey, KeyedInstanceIdentifier<Tables, TablesKey>>() {
133 public KeyedInstanceIdentifier<Tables, TablesKey> load(final TablesKey tablesKey) {
134 return BGPPeer.this.peerRibOutIId.child(Tables.class, tablesKey);
139 private BGPSession currentSession;
141 private AdjRibInWriter ribWriter;
143 private EffectiveRibInWriter effRibInWriter;
144 private ObjectRegistration<BgpPeerRpcService> rpcRegistration;
145 private Map<TablesKey, SendReceive> addPathTableMaps = Collections.emptyMap();
146 private YangInstanceIdentifier peerPath;
147 private boolean sessionUp;
148 private boolean llgrSupport;
149 private Stopwatch peerRestartStopwatch;
150 private long currentSelectionDeferralTimerSeconds;
151 private final List<TablesKey> missingEOT = new ArrayList<>();
154 final BGPTableTypeRegistryConsumer tableTypeRegistry,
155 final IpAddressNoZone neighborAddress,
156 final String peerGroupName,
159 final ClusterIdentifier clusterId,
160 final AsNumber localAs,
161 final RpcProviderService rpcRegistry,
162 final Set<TablesKey> afiSafisAdvertized,
163 final Set<TablesKey> afiSafisGracefulAdvertized,
164 final Map<TablesKey, Integer> llGracefulTablesAdvertised,
165 final BgpPeer bgpPeer) {
166 super(rib, Ipv4Util.toStringIP(neighborAddress), peerGroupName, role, clusterId,
167 localAs, neighborAddress, afiSafisAdvertized, afiSafisGracefulAdvertized, llGracefulTablesAdvertised);
168 this.tableTypeRegistry = requireNonNull(tableTypeRegistry);
169 this.rib = requireNonNull(rib);
170 this.rpcRegistry = rpcRegistry;
171 this.bgpPeer = bgpPeer;
174 private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
175 if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
176 final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
177 attributesBuilder.setCNextHop(mpReach.getCNextHop());
178 return attributesBuilder.build();
184 * Creates MPReach for the prefixes to be handled in the same way as linkstate routes.
186 * @param message Update message containing prefixes in NLRI
187 * @return MpReachNlri with prefixes from the nlri field
189 private static MpReachNlri prefixesToMpReach(final Update message) {
190 final List<Ipv4Prefixes> prefixes = message.getNlri().stream()
191 .map(n -> new Ipv4PrefixesBuilder().setPrefix(n.getPrefix()).setPathId(n.getPathId()).build())
192 .collect(Collectors.toList());
193 final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
194 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
195 new AdvertizedRoutesBuilder().setDestinationType(
196 new DestinationIpv4CaseBuilder().setDestinationIpv4(
197 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
198 if (message.getAttributes() != null) {
199 b.setCNextHop(message.getAttributes().getCNextHop());
205 * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes.
207 * @param message Update message containing withdrawn routes
208 * @param isAnyNlriAnnounced isAnyNlriAnnounced
209 * @return MpUnreachNlri with prefixes from the withdrawn routes field
211 private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
212 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
213 message.getWithdrawnRoutes().forEach(w -> {
215 Optional<Nlri> nlriAnounced = Optional.empty();
216 if (isAnyNlriAnnounced) {
217 nlriAnounced = message.getNlri().stream().filter(n -> Objects.equals(n.getPrefix(), w.getPrefix())
218 && Objects.equals(n.getPathId(), w.getPathId()))
221 if (!nlriAnounced.isPresent()) {
222 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(w.getPrefix()).setPathId(w.getPathId()).build());
225 return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class)
226 .setWithdrawnRoutes(new WithdrawnRoutesBuilder().setDestinationType(new org.opendaylight.yang.gen.v1
227 .urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.update.attributes.mp.unreach.nlri
228 .withdrawn.routes.destination.type.DestinationIpv4CaseBuilder().setDestinationIpv4(
229 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
232 private static Map<TablesKey, SendReceive> mapTableTypesFamilies(final List<AddressFamilies> addPathTablesType) {
233 return ImmutableMap.copyOf(addPathTablesType.stream().collect(Collectors.toMap(af -> new TablesKey(af.getAfi(),
234 af.getSafi()), BgpAddPathTableType::getSendReceive)));
237 public synchronized void instantiateServiceInstance() {
239 this.ribWriter = AdjRibInWriter.create(this.rib.getYangRibId(), this.peerRole, this);
244 public synchronized FluentFuture<? extends CommitInfo> close() {
245 final FluentFuture<? extends CommitInfo> future = releaseConnection();
252 public void onMessage(final BGPSession session, final Notification msg) throws BGPDocumentedException {
253 if (msg instanceof Update) {
254 onUpdateMessage((Update) msg);
255 } else if (msg instanceof RouteRefresh) {
256 onRouteRefreshMessage((RouteRefresh) msg);
258 LOG.info("Ignoring unhandled message class {}", msg.getClass());
262 private void onRouteRefreshMessage(final RouteRefresh message) {
263 final Class<? extends AddressFamily> rrAfi = message.getAfi();
264 final Class<? extends SubsequentAddressFamily> rrSafi = message.getSafi();
266 final TablesKey key = new TablesKey(rrAfi, rrSafi);
267 synchronized (this) {
268 final AdjRibOutListener listener = this.adjRibOutListenerSet.remove(key);
269 if (listener != null) {
271 createAdjRibOutListener(key, listener.isMpSupported());
273 LOG.info("Ignoring RouteRefresh message. Afi/Safi is not supported: {}, {}.", rrAfi, rrSafi);
279 * Check for presence of well known mandatory attribute LOCAL_PREF in Update message.
281 * @param message Update message
283 private void checkMandatoryAttributesPresence(final Update message) throws BGPDocumentedException {
284 if (MessageUtil.isAnyNlriPresent(message)) {
285 final Attributes attrs = message.getAttributes();
286 if (this.peerRole == PeerRole.Ibgp && (attrs == null || attrs.getLocalPref() == null)) {
287 throw new BGPDocumentedException(BGPError.MANDATORY_ATTR_MISSING_MSG + "LOCAL_PREF",
288 BGPError.WELL_KNOWN_ATTR_MISSING,
289 new byte[]{LocalPreferenceAttributeParser.TYPE});
295 * Process Update message received.
296 * Calls {@link #checkMandatoryAttributesPresence(Update)} to check for presence of mandatory attributes.
298 * @param message Update message
300 private synchronized void onUpdateMessage(final Update message) throws BGPDocumentedException {
301 checkMandatoryAttributesPresence(message);
304 final Attributes attrs = message.getAttributes();
306 final boolean isAnyNlriAnnounced = message.getNlri() != null;
307 if (isAnyNlriAnnounced) {
308 mpReach = prefixesToMpReach(message);
310 mpReach = MessageUtil.getMpReachNlri(attrs);
312 if (mpReach != null) {
313 this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
315 final MpUnreachNlri mpUnreach;
316 if (message.getWithdrawnRoutes() != null) {
317 mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
319 mpUnreach = MessageUtil.getMpUnreachNlri(attrs);
321 final boolean endOfRib = BgpPeerUtil.isEndOfRib(message);
322 if (mpUnreach != null) {
324 final TablesKey tablesKey = new TablesKey(mpUnreach.getAfi(), mpUnreach.getSafi());
325 this.ribWriter.removeStaleRoutes(tablesKey);
326 this.missingEOT.remove(tablesKey);
327 handleGracefulEndOfRib();
329 this.ribWriter.removeRoutes(mpUnreach);
331 } else if (endOfRib) {
332 this.ribWriter.removeStaleRoutes(IPV4_UCAST_TABLE_KEY);
333 this.missingEOT.remove(IPV4_UCAST_TABLE_KEY);
334 handleGracefulEndOfRib();
339 private void handleGracefulEndOfRib() {
340 if (isLocalRestarting()) {
341 if (this.missingEOT.isEmpty()) {
342 createEffRibInWriter();
343 this.effRibInWriter.init();
344 registerPrefixesCounters(this.effRibInWriter, this.effRibInWriter);
345 for (final TablesKey key : getAfiSafisAdvertized()) {
346 createAdjRibOutListener(key, true);
348 setLocalRestartingState(false);
349 setGracefulPreferences(false, Collections.emptySet());
355 public synchronized void onSessionUp(final BGPSession session) {
356 this.currentSession = session;
357 this.sessionUp = true;
358 this.bindingChain = this.rib.createPeerChain(this);
359 if (this.currentSession instanceof BGPSessionStateProvider) {
360 ((BGPSessionStateProvider) this.currentSession).registerMessagesCounter(this);
362 final GracefulRestartCapability advertisedGracefulRestartCapability =
363 session.getAdvertisedGracefulRestartCapability();
364 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp
365 .capabilities.graceful.restart.capability.Tables> advertisedTables =
366 advertisedGracefulRestartCapability.getTables();
367 final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp
368 .capabilities.ll.graceful.restart.capability.Tables> advertisedLLTables =
369 session.getAdvertisedLlGracefulRestartCapability().getTables();
371 final List<AddressFamilies> addPathTablesType = session.getAdvertisedAddPathTableTypes();
372 final Set<BgpTableType> advertizedTableTypes = session.getAdvertisedTableTypes();
373 LOG.info("Session with peer {} went up with tables {} and Add Path tables {}", this.name,
374 advertizedTableTypes, addPathTablesType);
375 final Set<TablesKey> setTables = advertizedTableTypes.stream().map(t -> new TablesKey(t.getAfi(), t.getSafi()))
376 .collect(Collectors.toSet());
377 this.tables = ImmutableSet.copyOf(setTables);
379 this.addPathTableMaps = mapTableTypesFamilies(addPathTablesType);
380 final boolean restartingLocally = isLocalRestarting();
382 if (!isRestartingGracefully()) {
383 this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
384 this.peerId = RouterIds.createPeerId(session.getBgpId());
385 this.peerIId = getInstanceIdentifier().child(org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns
386 .yang.bgp.rib.rev180329.bgp.rib.rib.Peer.class, new PeerKey(this.peerId));
387 this.peerPath = createPeerPath();
388 this.peerRibOutIId = peerIId.child(AdjRibOut.class);
389 this.trackerRegistration = this.rib.getPeerTracker().registerPeer(this);
390 createEffRibInWriter();
391 registerPrefixesCounters(this.effRibInWriter, this.effRibInWriter);
393 this.effRibInWriter.init();
394 this.ribWriter = this.ribWriter.transform(this.peerId, this.peerPath, this.rib.getRibSupportContext(),
395 this.tables, this.addPathTableMaps);
397 if (this.rpcRegistry != null) {
398 this.rpcRegistration = this.rpcRegistry.registerRpcImplementation(BgpPeerRpcService.class,
399 new BgpPeerRpc(this, session, this.tables), ImmutableSet.of(this.rib.getInstanceIdentifier().child(
400 org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib
401 .Peer.class, new PeerKey(this.peerId))));
404 final Set<TablesKey> forwardingTables;
405 if (advertisedTables == null) {
406 forwardingTables = Collections.emptySet();
408 forwardingTables = advertisedTables.stream()
409 .filter(table -> table.getAfiFlags() != null)
410 .filter(table -> table.getAfiFlags().isForwardingState())
411 .map(table -> new TablesKey(table.getAfi(), table.getSafi()))
412 .collect(Collectors.toSet());
414 this.ribWriter.clearTables(Sets.difference(this.tables, forwardingTables));
415 if (restartingLocally) {
416 this.effRibInWriter.close();
417 this.peerRestartStopwatch = Stopwatch.createStarted();
418 handleSelectionReferralTimer();
419 this.missingEOT.addAll(this.tables);
422 if (advertisedTables == null || advertisedTables.isEmpty()) {
423 setAdvertizedGracefulRestartTableTypes(Collections.emptyList());
425 setAdvertizedGracefulRestartTableTypes(advertisedTables.stream()
426 .map(t -> new TablesKey(t.getAfi(), t.getSafi())).collect(Collectors.toList()));
428 setAfiSafiGracefulRestartState(advertisedGracefulRestartCapability.getRestartTime().toJava(), false,
431 final Map<TablesKey, Integer> llTablesReceived;
432 if (advertisedLLTables != null) {
433 llTablesReceived = new HashMap<>();
434 for (org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.mp
435 .capabilities.ll.graceful.restart.capability.Tables table : advertisedLLTables) {
436 llTablesReceived.put(new TablesKey(table.getAfi(), table.getSafi()),
437 table.getLongLivedStaleTime().getValue().intValue());
440 llTablesReceived = Collections.emptyMap();
442 setAdvertizedLlGracefulRestartTableTypes(llTablesReceived);
444 if (!llTablesReceived.isEmpty()) {
446 // FIXME: propagate preserved tables
448 // FIXME: clear preserved tables
452 if (!restartingLocally) {
454 for (final TablesKey key : getAfiSafisAdvertized()) {
455 createAdjRibOutListener(key, true);
459 // SpotBugs does not grok Optional.ifPresent() and thinks we are using unsynchronized access
460 final Optional<RevisedErrorHandlingSupport> errorHandling = this.bgpPeer.getErrorHandling();
461 if (errorHandling.isPresent()) {
462 this.currentSession.addDecoderConstraint(RevisedErrorHandlingSupport.class, errorHandling.get());
466 private boolean isRestartingGracefully() {
467 return isLocalRestarting() || isPeerRestarting();
470 private synchronized void createEffRibInWriter() {
471 this.effRibInWriter = new EffectiveRibInWriter(this, this.rib,
472 this.rib.createPeerDOMChain(this),
473 this.peerPath, this.tables, this.tableTypeRegistry,
478 //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
480 private void addBgp4Support() {
481 if (!this.tables.contains(IPV4_UCAST_TABLE_KEY)) {
482 final HashSet<TablesKey> newSet = new HashSet<>(this.tables);
483 newSet.add(IPV4_UCAST_TABLE_KEY);
484 this.tables = ImmutableSet.copyOf(newSet);
485 createAdjRibOutListener(IPV4_UCAST_TABLE_KEY, false);
490 private void createAdjRibOutListener(final TablesKey key, final boolean mpSupport) {
491 final RIBSupport<?, ?, ?, ?> ribSupport = this.rib.getRibSupportContext().getRIBSupport(key);
493 // not particularly nice
494 if (ribSupport != null && this.currentSession instanceof BGPSessionImpl) {
495 final ChannelOutputLimiter limiter = ((BGPSessionImpl) this.currentSession).getLimiter();
496 final AdjRibOutListener adjRibOut = AdjRibOutListener.create(this.peerId, key,
497 this.rib.getYangRibId(), this.rib.getCodecsRegistry(), ribSupport,
498 this.rib.getService(), limiter, mpSupport);
499 this.adjRibOutListenerSet.put(key, adjRibOut);
500 registerPrefixesSentCounter(key, adjRibOut);
505 public synchronized void onSessionDown(final BGPSession session, final Exception exc) {
506 if (exc.getMessage().equals(BGPSessionImpl.END_OF_INPUT)) {
507 LOG.info("Session with peer {} went down", this.name);
509 LOG.info("Session with peer {} went down", this.name, exc);
511 releaseConnectionGracefully();
515 public synchronized void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
516 LOG.info("Session with peer {} terminated: {}", this.name, cause);
517 releaseConnectionGracefully();
521 public String toString() {
522 return MoreObjects.toStringHelper(this).add("name", this.name).add("tables", this.tables).toString();
526 public synchronized FluentFuture<? extends CommitInfo> releaseConnection() {
527 LOG.info("Closing session with peer");
528 this.sessionUp = false;
529 this.adjRibOutListenerSet.values().forEach(AdjRibOutListener::close);
530 this.adjRibOutListenerSet.clear();
531 final FluentFuture<? extends CommitInfo> future;
532 if (!isRestartingGracefully()) {
533 future = terminateConnection();
535 final Set<TablesKey> gracefulTables = getGracefulTables();
536 this.ribWriter.storeStaleRoutes(gracefulTables);
537 future = this.ribWriter.clearTables(Sets.difference(this.tables, gracefulTables));
538 if (isPeerRestarting()) {
539 this.peerRestartStopwatch = Stopwatch.createStarted();
540 handleRestartTimer();
543 releaseBindingChain();
550 @SuppressWarnings("checkstyle:illegalCatch")
551 private void closeSession() {
552 if (this.currentSession != null) {
554 if (isRestartingGracefully()) {
555 this.currentSession.closeWithoutMessage();
557 this.currentSession.close();
559 } catch (final Exception e) {
560 LOG.warn("Error closing session with peer", e);
562 this.currentSession = null;
566 private Set<TablesKey> getGracefulTables() {
567 return this.tables.stream()
568 .filter(this::isGracefulRestartReceived)
569 .filter(this::isGracefulRestartAdvertized)
570 .collect(Collectors.toSet());
573 private synchronized FluentFuture<? extends CommitInfo> terminateConnection() {
574 final FluentFuture<? extends CommitInfo> future;
575 if (this.trackerRegistration != null) {
576 this.trackerRegistration.close();
577 this.trackerRegistration = null;
579 if (this.rpcRegistration != null) {
580 this.rpcRegistration.close();
582 this.ribWriter.releaseChain();
584 if (this.effRibInWriter != null) {
585 this.effRibInWriter.close();
587 this.tables = ImmutableSet.of();
588 this.addPathTableMaps = Collections.emptyMap();
589 future = removePeer(this.peerPath);
596 * If Graceful Restart Timer expires, remove all routes advertised by peer.
598 private synchronized void handleRestartTimer() {
599 if (!isPeerRestarting()) {
603 final long peerRestartTimeNanos = TimeUnit.SECONDS.toNanos(getPeerRestartTime());
604 final long elapsedNanos = this.peerRestartStopwatch.elapsed(TimeUnit.NANOSECONDS);
605 if (elapsedNanos >= peerRestartTimeNanos) {
606 setAfiSafiGracefulRestartState(0, false, false);
607 onSessionTerminated(this.currentSession, new BGPTerminationReason(BGPError.HOLD_TIMER_EXPIRED));
610 currentSession.schedule(this::handleRestartTimer, peerRestartTimeNanos - elapsedNanos, TimeUnit.NANOSECONDS);
613 private synchronized void handleSelectionReferralTimer() {
614 if (!isLocalRestarting()) {
618 final long referalTimerNanos = TimeUnit.SECONDS.toNanos(this.currentSelectionDeferralTimerSeconds);
619 final long elapsedNanos = this.peerRestartStopwatch.elapsed(TimeUnit.NANOSECONDS);
620 if (elapsedNanos >= referalTimerNanos) {
621 this.missingEOT.clear();
622 handleGracefulEndOfRib();
624 currentSession.schedule(this::handleSelectionReferralTimer, referalTimerNanos - elapsedNanos,
625 TimeUnit.NANOSECONDS);
628 private void releaseConnectionGracefully() {
629 if (getPeerRestartTime() > 0) {
630 setRestartingState();
635 @SuppressFBWarnings("IS2_INCONSISTENT_SYNC")
637 public SendReceive getSupportedAddPathTables(final TablesKey tableKey) {
638 return this.addPathTableMaps.get(tableKey);
642 public boolean supportsTable(final TablesKey tableKey) {
643 return this.sessionUp && getAfiSafisAdvertized().contains(tableKey);
647 public KeyedInstanceIdentifier<Tables, TablesKey> getRibOutIId(final TablesKey tablesKey) {
648 return this.tablesIId.getUnchecked(tablesKey);
652 public synchronized void onTransactionChainFailed(final DOMTransactionChain chain,
653 final DOMDataTreeTransaction transaction, final Throwable cause) {
654 LOG.error("Transaction domChain failed.", cause);
659 public synchronized void onTransactionChainFailed(final TransactionChain chain, final Transaction transaction,
660 final Throwable cause) {
661 LOG.error("Transaction domChain failed.", cause);
666 public synchronized void markUptodate(final TablesKey tablesKey) {
667 this.ribWriter.markTableUptodate(tablesKey);
671 public synchronized BGPSessionState getBGPSessionState() {
672 if (this.currentSession instanceof BGPSessionStateProvider) {
673 return ((BGPSessionStateProvider) this.currentSession).getBGPSessionState();
679 public synchronized BGPTimersState getBGPTimersState() {
680 if (this.currentSession instanceof BGPSessionStateProvider) {
681 return ((BGPSessionStateProvider) this.currentSession).getBGPTimersState();
687 public synchronized BGPTransportState getBGPTransportState() {
688 if (this.currentSession instanceof BGPSessionStateProvider) {
689 return ((BGPSessionStateProvider) this.currentSession).getBGPTransportState();
695 public List<RouteTarget> getMemberships() {
696 return this.rtMemberships;
700 public synchronized ListenableFuture<?> restartGracefully(final long selectionDeferralTimerSeconds) {
701 final Set<TablesKey> tablesToPreserve = getGracefulTables();
702 if (tablesToPreserve == null || tablesToPreserve.isEmpty()) {
703 LOG.info("Peer {} is not capable of graceful restart or have no matching graceful tables.", this.peerId);
704 return Futures.immediateFailedFuture(new UnsupportedOperationException(
705 "Peer is not capable of graceful restart"));
707 setGracefulPreferences(true, tablesToPreserve);
708 this.currentSelectionDeferralTimerSeconds = selectionDeferralTimerSeconds;
709 setLocalRestartingState(true);
710 return releaseConnection();
714 boolean supportsLLGR() {
715 return this.llgrSupport;
718 private synchronized void setGracefulPreferences(final boolean localRestarting,
719 final Set<TablesKey> preservedTables) {
720 final Set<TablesKey> gracefulTables = this.tables.stream()
721 .filter(this::isGracefulRestartAdvertized)
722 .collect(Collectors.toSet());
723 final BgpParameters bgpParameters = GracefulRestartUtil.getGracefulBgpParameters(
724 this.bgpPeer.getBgpFixedCapabilities(), gracefulTables, preservedTables,
725 this.bgpPeer.getGracefulRestartTimer(), localRestarting, Collections.emptySet());
726 final BGPSessionPreferences oldPrefs = this.rib.getDispatcher().getBGPPeerRegistry()
727 .getPeerPreferences(getNeighborAddress());
728 final BGPSessionPreferences newPrefs = new BGPSessionPreferences(
730 oldPrefs.getHoldTime(),
732 oldPrefs.getExpectedRemoteAs(),
733 Collections.singletonList(bgpParameters),
734 oldPrefs.getMd5Password());
735 this.rib.getDispatcher().getBGPPeerRegistry()
736 .updatePeerPreferences(getNeighborAddress(), newPrefs);