bgp/rib-impl/src/main/java/org/opendaylight/protocol/bgp/rib/impl/BGPPeer.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.protocol.bgp.rib.impl;
   9
  10 import static org.opendaylight.protocol.bgp.rib.impl.AdjRibInWriter.isAnnounceNone;
  11 import static org.opendaylight.protocol.bgp.rib.impl.AdjRibInWriter.isLearnNone;
  12
  13 import com.google.common.base.MoreObjects;
  14 import com.google.common.base.MoreObjects.ToStringHelper;
  15 import com.google.common.base.Preconditions;
  16 import com.google.common.collect.ImmutableMap;
  17 import com.google.common.net.InetAddresses;
  18 import java.util.ArrayList;
  19 import java.util.Arrays;
  20 import java.util.HashMap;
  21 import java.util.HashSet;
  22 import java.util.List;
  23 import java.util.Map;
  24 import java.util.Optional;
  25 import java.util.Set;
  26 import java.util.stream.Collectors;
  27 import javax.annotation.concurrent.GuardedBy;
  28 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeMXBean;
  29 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistration;
  30 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistrator;
  31 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpPeerState;
  32 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpSessionState;
  33 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  34 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  35 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  36 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  37 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.RoutedRpcRegistration;
  38 import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
  39 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
  40 import org.opendaylight.protocol.bgp.parser.BGPError;
  41 import org.opendaylight.protocol.bgp.parser.impl.message.update.LocalPreferenceAttributeParser;
  42 import org.opendaylight.protocol.bgp.parser.spi.MessageUtil;
  43 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
  44 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
  45 import org.opendaylight.protocol.bgp.rib.impl.stats.peer.BGPPeerStats;
  46 import org.opendaylight.protocol.bgp.rib.impl.stats.peer.BGPPeerStatsImpl;
  47 import org.opendaylight.protocol.bgp.rib.impl.stats.peer.BGPSessionStats;
  48 import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
  49 import org.opendaylight.protocol.bgp.rib.spi.BGPSessionListener;
  50 import org.opendaylight.protocol.bgp.rib.spi.BGPTerminationReason;
  51 import org.opendaylight.protocol.bgp.rib.spi.ExportPolicyPeerTracker;
  52 import org.opendaylight.protocol.bgp.rib.spi.IdentifierUtils;
  53 import org.opendaylight.protocol.bgp.rib.spi.Peer;
  54 import org.opendaylight.protocol.bgp.rib.spi.RouterIds;
  55 import org.opendaylight.protocol.concepts.AbstractRegistration;
  56 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.DestinationIpv4Builder;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationIpv4CaseBuilder;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpAddPathTableType;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.RouteRefresh;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.SendReceive;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.add.path.capability.AddressFamilies;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlriBuilder;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlriBuilder;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.peer.rpc.rev160322.BgpPeerRpcService;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.peer.rpc.rev160322.PeerContext;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.SimpleRoutingPolicy;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.PeerKey;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.Ipv4AddressFamily;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.UnicastSubsequentAddressFamily;
  86 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  87 import org.opendaylight.yangtools.yang.binding.Notification;
  88 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  89 import org.slf4j.Logger;
  90 import org.slf4j.LoggerFactory;
  91
  92 /**
  93  * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
  94  * RIB actions.
  95  */
  96 public class BGPPeer implements BGPSessionListener, Peer, AutoCloseable, BGPPeerRuntimeMXBean, TransactionChainListener {
  97
  98     private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
  99
 100     @GuardedBy("this")
 101     private final Set<TablesKey> tables = new HashSet<>();
 102     @GuardedBy("this")
 103     private BGPSession session;
 104     @GuardedBy("this")
 105     private byte[] rawIdentifier;
 106     @GuardedBy("this")
 107     private DOMTransactionChain chain;
 108     @GuardedBy("this")
 109     private AdjRibInWriter ribWriter;
 110     @GuardedBy("this")
 111     private EffectiveRibInWriter effRibInWriter;
 112
 113     private final RIB rib;
 114     private final String name;
 115     private BGPPeerRuntimeRegistrator registrator;
 116     private BGPPeerRuntimeRegistration runtimeReg;
 117     private final Map<TablesKey, AdjRibOutListener> adjRibOutListenerSet = new HashMap();
 118     private final RpcProviderRegistry rpcRegistry;
 119     private RoutedRpcRegistration<BgpPeerRpcService> rpcRegistration;
 120     private final PeerRole peerRole;
 121     private final Optional<SimpleRoutingPolicy> simpleRoutingPolicy;
 122     private final BGPPeerStats peerStats;
 123     private YangInstanceIdentifier peerIId;
 124     private final Set<AbstractRegistration> tableRegistration = new HashSet<>();
 125
 126     public BGPPeer(final String name, final RIB rib, final PeerRole role, final SimpleRoutingPolicy peerStatus, final RpcProviderRegistry rpcRegistry) {
 127         this.peerRole = role;
 128         this.simpleRoutingPolicy = Optional.ofNullable(peerStatus);
 129         this.rib = Preconditions.checkNotNull(rib);
 130         this.name = name;
 131         this.rpcRegistry = rpcRegistry;
 132         this.peerStats = new BGPPeerStatsImpl(this.name, this.tables);
 133         this.chain = rib.createPeerChain(this);
 134     }
 135
 136     public BGPPeer(final String name, final RIB rib, final PeerRole role, final RpcProviderRegistry rpcRegistry) {
 137         this(name, rib, role, null, rpcRegistry);
 138     }
 139
 140     public void instantiateServiceInstance() {
 141         // add current peer to "configured BGP peer" stats
 142         this.rib.getRenderStats().getConfiguredPeerCounter().increaseCount();
 143         this.ribWriter = AdjRibInWriter.create(rib.getYangRibId(), this.peerRole, this.simpleRoutingPolicy, this.chain);
 144     }
 145
 146     @Override
 147     public synchronized void close() {
 148         releaseConnection();
 149         this.chain.close();
 150     }
 151
 152     @Override
 153     public void onMessage(final BGPSession session, final Notification msg) throws BGPDocumentedException {
 154         if (!(msg instanceof Update) && !(msg instanceof RouteRefresh)) {
 155             LOG.info("Ignoring unhandled message class {}", msg.getClass());
 156             return;
 157         }
 158         if (msg instanceof Update) {
 159             onUpdateMessage((Update) msg);
 160         } else {
 161             onRouteRefreshMessage((RouteRefresh) msg, session);
 162         }
 163     }
 164
 165     private void onRouteRefreshMessage(final RouteRefresh message, final BGPSession session) {
 166         final Class<? extends AddressFamily> rrAfi = message.getAfi();
 167         final Class<? extends SubsequentAddressFamily> rrSafi = message.getSafi();
 168
 169         final TablesKey key = new TablesKey(rrAfi, rrSafi);
 170         final AdjRibOutListener listener = this.adjRibOutListenerSet.get(key);
 171         if (listener != null) {
 172             listener.close();
 173             this.adjRibOutListenerSet.remove(key);
 174             createAdjRibOutListener(RouterIds.createPeerId(session.getBgpId()), key, listener.isMpSupported());
 175         } else {
 176             LOG.info("Ignoring RouteRefresh message. Afi/Safi is not supported: {}, {}.", rrAfi, rrSafi);
 177         }
 178     }
 179
 180     /**
 181      * Check for presence of well known mandatory attribute LOCAL_PREF in Update message
 182      *
 183      * @param message Update message
 184      * @throws BGPDocumentedException
 185      */
 186     private void checkMandatoryAttributesPresence(final Update message) throws BGPDocumentedException {
 187         if (MessageUtil.isAnyNlriPresent(message)) {
 188             final Attributes attrs = message.getAttributes();
 189             if (this.peerRole == PeerRole.Ibgp && (attrs == null || attrs.getLocalPref() == null)) {
 190                 throw new BGPDocumentedException(BGPError.MANDATORY_ATTR_MISSING_MSG + "LOCAL_PREF",
 191                         BGPError.WELL_KNOWN_ATTR_MISSING,
 192                         new byte[] { LocalPreferenceAttributeParser.TYPE });
 193             }
 194         }
 195     }
 196
 197     /**
 198      * Process Update message received.
 199      * Calls {@link #checkMandatoryAttributesPresence(Update)} to check for presence of mandatory attributes.
 200      *
 201      * @param message Update message
 202      * @throws BGPDocumentedException
 203      */
 204     private void onUpdateMessage(final Update message) throws BGPDocumentedException {
 205         checkMandatoryAttributesPresence(message);
 206
 207         // update AdjRibs
 208         final Attributes attrs = message.getAttributes();
 209         MpReachNlri mpReach = null;
 210         final boolean isAnyNlriAnnounced = message.getNlri() != null;
 211         if (isAnyNlriAnnounced) {
 212             mpReach = prefixesToMpReach(message);
 213         } else {
 214             mpReach = MessageUtil.getMpReachNlri(attrs);
 215         }
 216         if (mpReach != null) {
 217             this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
 218         }
 219         MpUnreachNlri mpUnreach = null;
 220         if (message.getWithdrawnRoutes() != null) {
 221             mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
 222         } else {
 223             mpUnreach = MessageUtil.getMpUnreachNlri(attrs);
 224         }
 225         if (mpUnreach != null) {
 226             this.ribWriter.removeRoutes(mpUnreach);
 227         }
 228     }
 229
 230     private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
 231         if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
 232             final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
 233             attributesBuilder.setCNextHop(mpReach.getCNextHop());
 234             return attributesBuilder.build();
 235         }
 236         return attrs;
 237     }
 238
 239     /**
 240      * Creates MPReach for the prefixes to be handled in the same way as linkstate routes
 241      *
 242      * @param message Update message containing prefixes in NLRI
 243      * @return MpReachNlri with prefixes from the nlri field
 244      */
 245     private static MpReachNlri prefixesToMpReach(final Update message) {
 246         final List<Ipv4Prefixes> prefixes = new ArrayList<>();
 247         for (final Ipv4Prefix p : message.getNlri().getNlri()) {
 248             prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
 249         }
 250         final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
 251                 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
 252                         new AdvertizedRoutesBuilder().setDestinationType(
 253                                 new DestinationIpv4CaseBuilder().setDestinationIpv4(
 254                                         new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
 255         if (message.getAttributes() != null) {
 256             b.setCNextHop(message.getAttributes().getCNextHop());
 257         }
 258         return b.build();
 259     }
 260
 261     /**
 262      * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes
 263      *
 264      * @param message Update message containing withdrawn routes
 265      * @param isAnyNlriAnnounced
 266      * @return MpUnreachNlri with prefixes from the withdrawn routes field
 267      */
 268     private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
 269         final List<Ipv4Prefixes> prefixes = new ArrayList<>();
 270         for (final Ipv4Prefix p : message.getWithdrawnRoutes().getWithdrawnRoutes()) {
 271             boolean nlriAnounced = false;
 272             if(isAnyNlriAnnounced) {
 273                 nlriAnounced = message.getNlri().getNlri().contains(p);
 274             }
 275
 276             if(!nlriAnounced) {
 277                 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
 278             }
 279         }
 280         return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class).setWithdrawnRoutes(
 281                 new WithdrawnRoutesBuilder().setDestinationType(
 282                         new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationIpv4CaseBuilder().setDestinationIpv4(
 283                                 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
 284     }
 285
 286     @Override
 287     public synchronized void onSessionUp(final BGPSession session) {
 288         final List<AddressFamilies> addPathTablesType = session.getAdvertisedAddPathTableTypes();
 289         final Set<BgpTableType> advertizedTableTypes = session.getAdvertisedTableTypes();
 290         LOG.info("Session with peer {} went up with tables {} and Add Path tables {}", this.name, advertizedTableTypes, addPathTablesType);
 291         this.session = session;
 292
 293         this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
 294         final PeerId peerId = RouterIds.createPeerId(session.getBgpId());
 295
 296         this.tables.addAll(advertizedTableTypes.stream().map(t -> new TablesKey(t.getAfi(), t.getSafi())).collect(Collectors.toList()));
 297         final boolean announceNone = isAnnounceNone(this.simpleRoutingPolicy);
 298         final Map<TablesKey, SendReceive> addPathTableMaps = mapTableTypesFamilies(addPathTablesType);
 299         this.peerIId = this.rib.getYangRibId().node(org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer.QNAME)
 300             .node(IdentifierUtils.domPeerId(peerId));
 301
 302         if(!announceNone) {
 303             createAdjRibOutListener(peerId);
 304         }
 305         this.tables.forEach(tablesKey -> {
 306             final ExportPolicyPeerTracker exportTracker = this.rib.getExportPolicyPeerTracker(tablesKey);
 307             if (exportTracker != null) {
 308                 this.tableRegistration.add(exportTracker.registerPeer(peerId, addPathTableMaps.get(tablesKey), this.peerIId, this.peerRole,
 309                     this.simpleRoutingPolicy));
 310             }
 311         });
 312         addBgp4Support(peerId, announceNone);
 313
 314         if(!isLearnNone(this.simpleRoutingPolicy)) {
 315             this.effRibInWriter = EffectiveRibInWriter.create(this.rib.getService(), this.rib.createPeerChain(this), this.peerIId,
 316                 this.rib.getImportPolicyPeerTracker(), this.rib.getRibSupportContext(), this.peerRole,
 317                 this.peerStats.getEffectiveRibInRouteCounters(), this.peerStats.getAdjRibInRouteCounters());
 318         }
 319         this.ribWriter = this.ribWriter.transform(peerId, this.rib.getRibSupportContext(), this.tables, addPathTableMaps);
 320
 321         // register BGP Peer stats
 322         this.peerStats.getSessionEstablishedCounter().increaseCount();
 323         if (this.registrator != null) {
 324             this.runtimeReg = this.registrator.register(this);
 325         }
 326
 327         if (this.rpcRegistry != null) {
 328             this.rpcRegistration = this.rpcRegistry.addRoutedRpcImplementation(BgpPeerRpcService.class, new BgpPeerRpc(session, this.tables));
 329             final KeyedInstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer, PeerKey> path =
 330                     this.rib.getInstanceIdentifier().child(org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer.class, new PeerKey(peerId));
 331             this.rpcRegistration.registerPath(PeerContext.class, path);
 332         }
 333
 334         this.rib.getRenderStats().getConnectedPeerCounter().increaseCount();
 335     }
 336
 337     private void createAdjRibOutListener(final PeerId peerId) {
 338         this.tables.forEach(key->createAdjRibOutListener(peerId, key, true));
 339     }
 340
 341     //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
 342     private void addBgp4Support(final PeerId peerId, final boolean announceNone) {
 343         final TablesKey key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
 344         if (this.tables.add(key) && !announceNone) {
 345             createAdjRibOutListener(peerId, key, false);
 346         }
 347     }
 348
 349     private void createAdjRibOutListener(final PeerId peerId, final TablesKey key, final boolean mpSupport) {
 350         final RIBSupportContext context = this.rib.getRibSupportContext().getRIBSupportContext(key);
 351
 352         // not particularly nice
 353         if (context != null && this.session instanceof BGPSessionImpl) {
 354             this.adjRibOutListenerSet.put(key, AdjRibOutListener.create(peerId, key, this.rib.getYangRibId(), this.rib.getCodecsRegistry(),
 355                 context.getRibSupport(), this.rib.getService(), ((BGPSessionImpl) this.session).getLimiter(), mpSupport,
 356                 this.peerStats.getAdjRibOutRouteCounters().init(key)));
 357         }
 358     }
 359
 360     private void cleanup() {
 361         // FIXME: BUG-196: support graceful
 362         this.adjRibOutListenerSet.values().forEach(AdjRibOutListener::close);
 363         this.adjRibOutListenerSet.clear();
 364         if (this.effRibInWriter != null) {
 365             this.effRibInWriter.close();
 366         }
 367         if(this.ribWriter != null) {
 368             this.ribWriter.removePeer();
 369         }
 370         this.tables.clear();
 371     }
 372
 373     @Override
 374     public void onSessionDown(final BGPSession session, final Exception e) {
 375         if(e.getMessage().equals(BGPSessionImpl.END_OF_INPUT)) {
 376             LOG.info("Session with peer {} went down", this.name);
 377         } else {
 378             LOG.info("Session with peer {} went down", this.name, e);
 379         }
 380         releaseConnection();
 381     }
 382
 383     @Override
 384     public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
 385         LOG.info("Session with peer {} terminated: {}", this.name, cause);
 386         releaseConnection();
 387     }
 388
 389     @Override
 390     public String toString() {
 391         return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
 392     }
 393
 394     protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
 395         toStringHelper.add("name", this.name);
 396         toStringHelper.add("tables", this.tables);
 397         return toStringHelper;
 398     }
 399
 400     @Override
 401     public String getName() {
 402         return this.name;
 403     }
 404
 405     @Override
 406     @GuardedBy("this")
 407     public synchronized void releaseConnection() {
 408         if (this.rpcRegistration != null) {
 409             this.rpcRegistration.close();
 410         }
 411         closeRegistration();
 412         cleanup();
 413         dropConnection();
 414     }
 415
 416     private void closeRegistration() {
 417         for (final AbstractRegistration tableCloseable : this.tableRegistration) {
 418             tableCloseable.close();
 419         }
 420         this.tableRegistration.clear();
 421     }
 422
 423     private void dropConnection() {
 424         if (this.runtimeReg != null) {
 425             this.runtimeReg.close();
 426             this.runtimeReg = null;
 427         }
 428         if (this.session != null) {
 429             try {
 430                 this.session.close();
 431             } catch (final Exception e) {
 432                 LOG.warn("Error closing session with peer", e);
 433             }
 434             this.session = null;
 435
 436             this.rib.getRenderStats().getConnectedPeerCounter().decreaseCount();
 437         }
 438     }
 439
 440     @Override
 441     public synchronized byte[] getRawIdentifier() {
 442         return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
 443     }
 444
 445     @Override
 446     public void resetSession() {
 447         releaseConnection();
 448     }
 449
 450     @Override
 451     public void resetStats() {
 452         if (this.session instanceof BGPSessionStats) {
 453             ((BGPSessionStats) this.session).resetBgpSessionStats();
 454         }
 455     }
 456
 457     @Override
 458     public BgpSessionState getBgpSessionState() {
 459         if (this.session instanceof BGPSessionStats) {
 460             return ((BGPSessionStats) this.session).getBgpSessionState();
 461         }
 462         return new BgpSessionState();
 463     }
 464
 465     @Override
 466     public synchronized BgpPeerState getBgpPeerState() {
 467         return this.peerStats.getBgpPeerState();
 468     }
 469
 470     @Override
 471     public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
 472         LOG.error("Transaction chain failed.", cause);
 473         this.chain.close();
 474         this.chain = this.rib.createPeerChain(this);
 475         this.ribWriter = AdjRibInWriter.create(this.rib.getYangRibId(), this.peerRole, this.simpleRoutingPolicy, this.chain);
 476         releaseConnection();
 477     }
 478
 479     @Override
 480     public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
 481         LOG.debug("Transaction chain {} successfull.", chain);
 482     }
 483
 484     @Override
 485     public void markUptodate(final TablesKey tablesKey) {
 486         this.ribWriter.markTableUptodate(tablesKey);
 487     }
 488
 489     private static Map<TablesKey, SendReceive> mapTableTypesFamilies(final List<AddressFamilies> addPathTablesType) {
 490         return ImmutableMap.copyOf(addPathTablesType.stream().collect(Collectors.toMap(af -> new TablesKey(af.getAfi(), af.getSafi()),
 491             BgpAddPathTableType::getSendReceive)));
 492     }
 493 }