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 java.util.Objects.requireNonNull;
  11 import static org.opendaylight.protocol.bgp.rib.impl.AdjRibInWriter.isAnnounceNone;
  12 import static org.opendaylight.protocol.bgp.rib.impl.AdjRibInWriter.isLearnNone;
  13
  14 import com.google.common.base.MoreObjects;
  15 import com.google.common.base.MoreObjects.ToStringHelper;
  16 import com.google.common.collect.ImmutableMap;
  17 import com.google.common.net.InetAddresses;
  18 import com.google.common.util.concurrent.Futures;
  19 import com.google.common.util.concurrent.ListenableFuture;
  20 import java.util.ArrayList;
  21 import java.util.Arrays;
  22 import java.util.HashMap;
  23 import java.util.HashSet;
  24 import java.util.List;
  25 import java.util.Map;
  26 import java.util.Optional;
  27 import java.util.Set;
  28 import java.util.stream.Collectors;
  29 import javax.annotation.Nonnull;
  30 import javax.annotation.concurrent.GuardedBy;
  31 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeMXBean;
  32 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistration;
  33 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistrator;
  34 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpPeerState;
  35 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpSessionState;
  36 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
  37 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
  38 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  39 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  40 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.RoutedRpcRegistration;
  41 import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
  42 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
  43 import org.opendaylight.protocol.bgp.parser.BGPError;
  44 import org.opendaylight.protocol.bgp.parser.impl.message.update.LocalPreferenceAttributeParser;
  45 import org.opendaylight.protocol.bgp.parser.spi.MessageUtil;
  46 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
  47 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
  48 import org.opendaylight.protocol.bgp.rib.impl.state.BGPPeerStateImpl;
  49 import org.opendaylight.protocol.bgp.rib.impl.state.BGPSessionStateProvider;
  50 import org.opendaylight.protocol.bgp.rib.impl.stats.peer.BGPPeerStats;
  51 import org.opendaylight.protocol.bgp.rib.impl.stats.peer.BGPPeerStatsImpl;
  52 import org.opendaylight.protocol.bgp.rib.impl.stats.peer.BGPSessionStats;
  53 import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
  54 import org.opendaylight.protocol.bgp.rib.spi.BGPSessionListener;
  55 import org.opendaylight.protocol.bgp.rib.spi.BGPTerminationReason;
  56 import org.opendaylight.protocol.bgp.rib.spi.ExportPolicyPeerTracker;
  57 import org.opendaylight.protocol.bgp.rib.spi.IdentifierUtils;
  58 import org.opendaylight.protocol.bgp.rib.spi.Peer;
  59 import org.opendaylight.protocol.bgp.rib.spi.RouterIds;
  60 import org.opendaylight.protocol.bgp.rib.spi.state.BGPAfiSafiState;
  61 import org.opendaylight.protocol.bgp.rib.spi.state.BGPErrorHandlingState;
  62 import org.opendaylight.protocol.bgp.rib.spi.state.BGPSessionState;
  63 import org.opendaylight.protocol.bgp.rib.spi.state.BGPTimersState;
  64 import org.opendaylight.protocol.bgp.rib.spi.state.BGPTransportState;
  65 import org.opendaylight.protocol.concepts.AbstractRegistration;
  66 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  67 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  68 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.DestinationIpv4Builder;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
  72 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;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpAddPathTableType;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.RouteRefresh;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.SendReceive;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.add.path.capability.AddressFamilies;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlriBuilder;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlriBuilder;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.peer.rpc.rev171027.BgpPeerRpcService;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.peer.rpc.rev171027.PeerContext;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.SimpleRoutingPolicy;
  92 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.PeerKey;
  93 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
  94 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
  95 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.Ipv4AddressFamily;
  96 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
  97 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.UnicastSubsequentAddressFamily;
  98 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  99 import org.opendaylight.yangtools.yang.binding.Notification;
 100 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 101 import org.slf4j.Logger;
 102 import org.slf4j.LoggerFactory;
 103
 104 /**
 105  * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
 106  * RIB actions.
 107  */
 108 public class BGPPeer extends BGPPeerStateImpl implements BGPSessionListener, Peer, BGPPeerRuntimeMXBean,
 109     TransactionChainListener {
 110     private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
 111
 112     @GuardedBy("this")
 113     private final Set<TablesKey> tables = new HashSet<>();
 114     @GuardedBy("this")
 115     private BGPSession session;
 116     @GuardedBy("this")
 117     private byte[] rawIdentifier;
 118     @GuardedBy("this")
 119     private DOMTransactionChain chain;
 120     @GuardedBy("this")
 121     private AdjRibInWriter ribWriter;
 122     @GuardedBy("this")
 123     private EffectiveRibInWriter effRibInWriter;
 124
 125     private final RIB rib;
 126     private final String name;
 127     private BGPPeerRuntimeRegistrator registrator;
 128     private BGPPeerRuntimeRegistration runtimeReg;
 129     private final Map<TablesKey, AdjRibOutListener> adjRibOutListenerSet = new HashMap<>();
 130     private final RpcProviderRegistry rpcRegistry;
 131     private RoutedRpcRegistration<BgpPeerRpcService> rpcRegistration;
 132     private final PeerRole peerRole;
 133     private final Optional<SimpleRoutingPolicy> simpleRoutingPolicy;
 134     private final BGPPeerStats peerStats;
 135     private YangInstanceIdentifier peerIId;
 136     private final Set<AbstractRegistration> tableRegistration = new HashSet<>();
 137
 138     public BGPPeer(final String name, final RIB rib, final PeerRole role, final SimpleRoutingPolicy peerStatus,
 139         final RpcProviderRegistry rpcRegistry,
 140         @Nonnull final Set<TablesKey> afiSafisAdvertized,
 141         @Nonnull final Set<TablesKey> afiSafisGracefulAdvertized) {
 142         //FIXME BUG-6971 Once Peer Group is implemented, pass it
 143         super(rib.getInstanceIdentifier(), null, new IpAddress(new Ipv4Address(name)), afiSafisAdvertized,
 144             afiSafisGracefulAdvertized);
 145         this.peerRole = role;
 146         this.simpleRoutingPolicy = Optional.ofNullable(peerStatus);
 147         this.rib = requireNonNull(rib);
 148         this.name = name;
 149         this.rpcRegistry = rpcRegistry;
 150         this.peerStats = new BGPPeerStatsImpl(this.name, this.tables, this);
 151         this.chain = rib.createPeerChain(this);
 152     }
 153
 154     public BGPPeer(final String name, final RIB rib, final PeerRole role,
 155         final RpcProviderRegistry rpcRegistry, @Nonnull final Set<TablesKey> afiSafisAdvertized,
 156         @Nonnull final Set<TablesKey> afiSafisGracefulAdvertized) {
 157         this(name, rib, role, null, rpcRegistry, afiSafisAdvertized, afiSafisGracefulAdvertized);
 158     }
 159
 160     public void instantiateServiceInstance() {
 161         // add current peer to "configured BGP peer" stats
 162         this.rib.getRenderStats().getConfiguredPeerCounter().increment();
 163         this.ribWriter = AdjRibInWriter.create(this.rib.getYangRibId(), this.peerRole, this.simpleRoutingPolicy, this.chain);
 164     }
 165
 166     // FIXME ListenableFuture<?> should be used once closeServiceInstance uses wildcard too
 167     @Override
 168     public synchronized ListenableFuture<Void> close() {
 169         final ListenableFuture<Void> future = releaseConnection();
 170         this.chain.close();
 171         return future;
 172     }
 173
 174     @Override
 175     public void onMessage(final BGPSession session, final Notification msg) throws BGPDocumentedException {
 176         if (!(msg instanceof Update) && !(msg instanceof RouteRefresh)) {
 177             LOG.info("Ignoring unhandled message class {}", msg.getClass());
 178             return;
 179         }
 180         if (msg instanceof Update) {
 181             onUpdateMessage((Update) msg);
 182         } else {
 183             onRouteRefreshMessage((RouteRefresh) msg, session);
 184         }
 185     }
 186
 187     private void onRouteRefreshMessage(final RouteRefresh message, final BGPSession session) {
 188         final Class<? extends AddressFamily> rrAfi = message.getAfi();
 189         final Class<? extends SubsequentAddressFamily> rrSafi = message.getSafi();
 190
 191         final TablesKey key = new TablesKey(rrAfi, rrSafi);
 192         final AdjRibOutListener listener = this.adjRibOutListenerSet.get(key);
 193         if (listener != null) {
 194             listener.close();
 195             this.adjRibOutListenerSet.remove(key);
 196             createAdjRibOutListener(RouterIds.createPeerId(session.getBgpId()), key, listener.isMpSupported());
 197         } else {
 198             LOG.info("Ignoring RouteRefresh message. Afi/Safi is not supported: {}, {}.", rrAfi, rrSafi);
 199         }
 200     }
 201
 202     /**
 203      * Check for presence of well known mandatory attribute LOCAL_PREF in Update message
 204      *
 205      * @param message Update message
 206      * @throws BGPDocumentedException
 207      */
 208     private void checkMandatoryAttributesPresence(final Update message) throws BGPDocumentedException {
 209         if (MessageUtil.isAnyNlriPresent(message)) {
 210             final Attributes attrs = message.getAttributes();
 211             if (this.peerRole == PeerRole.Ibgp && (attrs == null || attrs.getLocalPref() == null)) {
 212                 throw new BGPDocumentedException(BGPError.MANDATORY_ATTR_MISSING_MSG + "LOCAL_PREF",
 213                         BGPError.WELL_KNOWN_ATTR_MISSING,
 214                         new byte[] { LocalPreferenceAttributeParser.TYPE });
 215             }
 216         }
 217     }
 218
 219     /**
 220      * Process Update message received.
 221      * Calls {@link #checkMandatoryAttributesPresence(Update)} to check for presence of mandatory attributes.
 222      *
 223      * @param message Update message
 224      * @throws BGPDocumentedException
 225      */
 226     private void onUpdateMessage(final Update message) throws BGPDocumentedException {
 227         checkMandatoryAttributesPresence(message);
 228
 229         // update AdjRibs
 230         final Attributes attrs = message.getAttributes();
 231         MpReachNlri mpReach = null;
 232         final boolean isAnyNlriAnnounced = message.getNlri() != null;
 233         if (isAnyNlriAnnounced) {
 234             mpReach = prefixesToMpReach(message);
 235         } else {
 236             mpReach = MessageUtil.getMpReachNlri(attrs);
 237         }
 238         if (mpReach != null) {
 239             this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
 240         }
 241         MpUnreachNlri mpUnreach = null;
 242         if (message.getWithdrawnRoutes() != null) {
 243             mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
 244         } else {
 245             mpUnreach = MessageUtil.getMpUnreachNlri(attrs);
 246         }
 247         if (mpUnreach != null) {
 248             this.ribWriter.removeRoutes(mpUnreach);
 249         }
 250     }
 251
 252     private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
 253         if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
 254             final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
 255             attributesBuilder.setCNextHop(mpReach.getCNextHop());
 256             return attributesBuilder.build();
 257         }
 258         return attrs;
 259     }
 260
 261     /**
 262      * Creates MPReach for the prefixes to be handled in the same way as linkstate routes
 263      *
 264      * @param message Update message containing prefixes in NLRI
 265      * @return MpReachNlri with prefixes from the nlri field
 266      */
 267     private static MpReachNlri prefixesToMpReach(final Update message) {
 268         final List<Ipv4Prefixes> prefixes = new ArrayList<>();
 269         for (final Ipv4Prefix p : message.getNlri().getNlri()) {
 270             prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
 271         }
 272         final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
 273                 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
 274                         new AdvertizedRoutesBuilder().setDestinationType(
 275                                 new DestinationIpv4CaseBuilder().setDestinationIpv4(
 276                                         new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
 277         if (message.getAttributes() != null) {
 278             b.setCNextHop(message.getAttributes().getCNextHop());
 279         }
 280         return b.build();
 281     }
 282
 283     /**
 284      * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes
 285      *
 286      * @param message Update message containing withdrawn routes
 287      * @param isAnyNlriAnnounced
 288      * @return MpUnreachNlri with prefixes from the withdrawn routes field
 289      */
 290     private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
 291         final List<Ipv4Prefixes> prefixes = new ArrayList<>();
 292         for (final Ipv4Prefix p : message.getWithdrawnRoutes().getWithdrawnRoutes()) {
 293             boolean nlriAnounced = false;
 294             if(isAnyNlriAnnounced) {
 295                 nlriAnounced = message.getNlri().getNlri().contains(p);
 296             }
 297
 298             if(!nlriAnounced) {
 299                 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
 300             }
 301         }
 302         return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class).setWithdrawnRoutes(
 303                 new WithdrawnRoutesBuilder().setDestinationType(
 304                         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(
 305                                 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
 306     }
 307
 308     @Override
 309     public synchronized void onSessionUp(final BGPSession session) {
 310         this.session = session;
 311         if (this.session instanceof BGPSessionStateProvider) {
 312             ((BGPSessionStateProvider) this.session).registerMessagesCounter(this);
 313         }
 314
 315         final List<AddressFamilies> addPathTablesType = session.getAdvertisedAddPathTableTypes();
 316         final Set<BgpTableType> advertizedTableTypes = session.getAdvertisedTableTypes();
 317         final List<BgpTableType> advertizedGracefulRestartTableTypes = session.getAdvertisedGracefulRestartTableTypes();
 318         LOG.info("Session with peer {} went up with tables {} and Add Path tables {}", this.name, advertizedTableTypes, addPathTablesType);
 319         this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
 320         final PeerId peerId = RouterIds.createPeerId(session.getBgpId());
 321
 322         this.tables.addAll(advertizedTableTypes.stream().map(t -> new TablesKey(t.getAfi(), t.getSafi())).collect(Collectors.toList()));
 323
 324         setAdvertizedGracefulRestartTableTypes(advertizedGracefulRestartTableTypes.stream()
 325             .map(t -> new TablesKey(t.getAfi(), t.getSafi())).collect(Collectors.toList()));
 326         final boolean announceNone = isAnnounceNone(this.simpleRoutingPolicy);
 327         final Map<TablesKey, SendReceive> addPathTableMaps = mapTableTypesFamilies(addPathTablesType);
 328         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)
 329             .node(IdentifierUtils.domPeerId(peerId));
 330
 331         if(!announceNone) {
 332             createAdjRibOutListener(peerId);
 333         }
 334         this.tables.forEach(tablesKey -> {
 335             final ExportPolicyPeerTracker exportTracker = this.rib.getExportPolicyPeerTracker(tablesKey);
 336             if (exportTracker != null) {
 337                 this.tableRegistration.add(exportTracker.registerPeer(peerId, addPathTableMaps.get(tablesKey), this.peerIId, this.peerRole,
 338                     this.simpleRoutingPolicy));
 339             }
 340         });
 341         addBgp4Support(peerId, announceNone);
 342
 343         if(!isLearnNone(this.simpleRoutingPolicy)) {
 344             this.effRibInWriter = EffectiveRibInWriter.create(this.rib.getService(), this.rib.createPeerChain(this),
 345                 this.peerIId, this.rib.getImportPolicyPeerTracker(), this.rib.getRibSupportContext(), this.peerRole,
 346                 this.peerStats.getAdjRibInRouteCounters(), this.tables);
 347             registerPrefixesCounters(this.effRibInWriter, this.effRibInWriter);
 348         }
 349         this.ribWriter = this.ribWriter.transform(peerId, this.rib.getRibSupportContext(), this.tables, addPathTableMaps);
 350
 351         // register BGP Peer stats
 352         this.peerStats.getSessionEstablishedCounter().increment();
 353         if (this.registrator != null) {
 354             this.runtimeReg = this.registrator.register(this);
 355         }
 356
 357         if (this.rpcRegistry != null) {
 358             this.rpcRegistration = this.rpcRegistry.addRoutedRpcImplementation(BgpPeerRpcService.class,
 359                     new BgpPeerRpc(this, session, this.tables));
 360             final KeyedInstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer, PeerKey> path =
 361                     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));
 362             this.rpcRegistration.registerPath(PeerContext.class, path);
 363         }
 364
 365         this.rib.getRenderStats().getConnectedPeerCounter().increment();
 366     }
 367
 368     private void createAdjRibOutListener(final PeerId peerId) {
 369         this.tables.forEach(key->createAdjRibOutListener(peerId, key, true));
 370     }
 371
 372     //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
 373     private void addBgp4Support(final PeerId peerId, final boolean announceNone) {
 374         final TablesKey key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
 375         if (this.tables.add(key) && !announceNone) {
 376             createAdjRibOutListener(peerId, key, false);
 377         }
 378     }
 379
 380     private void createAdjRibOutListener(final PeerId peerId, final TablesKey key, final boolean mpSupport) {
 381         final RIBSupportContext context = this.rib.getRibSupportContext().getRIBSupportContext(key);
 382
 383         // not particularly nice
 384         if (context != null && this.session instanceof BGPSessionImpl) {
 385             final ChannelOutputLimiter limiter = ((BGPSessionImpl) this.session).getLimiter();
 386             final AdjRibOutListener adjRibOut = AdjRibOutListener.create(peerId, key,
 387                 this.rib.getYangRibId(), this.rib.getCodecsRegistry(), context.getRibSupport(),
 388                 this.rib.getService(), limiter, mpSupport, this.peerStats.getAdjRibOutRouteCounters().init(key));
 389             this.adjRibOutListenerSet.put(key, adjRibOut);
 390             registerPrefixesSentCounter(key, adjRibOut);
 391         }
 392     }
 393
 394     private ListenableFuture<Void> cleanup() {
 395         // FIXME: BUG-196: support graceful
 396         this.adjRibOutListenerSet.values().forEach(AdjRibOutListener::close);
 397         this.adjRibOutListenerSet.clear();
 398         if (this.effRibInWriter != null) {
 399             this.effRibInWriter.close();
 400         }
 401         this.tables.clear();
 402         if (this.ribWriter != null) {
 403             return this.ribWriter.removePeer();
 404         }
 405         return Futures.immediateFuture(null);
 406     }
 407
 408     @Override
 409     public void onSessionDown(final BGPSession session, final Exception e) {
 410         if(e.getMessage().equals(BGPSessionImpl.END_OF_INPUT)) {
 411             LOG.info("Session with peer {} went down", this.name);
 412         } else {
 413             LOG.info("Session with peer {} went down", this.name, e);
 414         }
 415         releaseConnection();
 416     }
 417
 418     @Override
 419     public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
 420         LOG.info("Session with peer {} terminated: {}", this.name, cause);
 421         releaseConnection();
 422     }
 423
 424     @Override
 425     public String toString() {
 426         return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
 427     }
 428
 429     protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
 430         toStringHelper.add("name", this.name);
 431         toStringHelper.add("tables", this.tables);
 432         return toStringHelper;
 433     }
 434
 435     @Override
 436     public String getName() {
 437         return this.name;
 438     }
 439
 440     @Override
 441     public synchronized ListenableFuture<Void> releaseConnection() {
 442         if (this.rpcRegistration != null) {
 443             this.rpcRegistration.close();
 444         }
 445         closeRegistration();
 446         final ListenableFuture<Void> future = cleanup();
 447         dropConnection();
 448         resetState();
 449         return future;
 450     }
 451
 452     private void closeRegistration() {
 453         for (final AbstractRegistration tableCloseable : this.tableRegistration) {
 454             tableCloseable.close();
 455         }
 456         this.tableRegistration.clear();
 457     }
 458
 459     private void dropConnection() {
 460         if (this.runtimeReg != null) {
 461             this.runtimeReg.close();
 462             this.runtimeReg = null;
 463         }
 464         if (this.session != null) {
 465             try {
 466                 this.session.close();
 467             } catch (final Exception e) {
 468                 LOG.warn("Error closing session with peer", e);
 469             }
 470             this.session = null;
 471
 472             this.rib.getRenderStats().getConnectedPeerCounter().decrement();
 473         }
 474     }
 475
 476     @Override
 477     public synchronized byte[] getRawIdentifier() {
 478         return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
 479     }
 480
 481     @Override
 482     public void resetSession() {
 483         releaseConnection();
 484     }
 485
 486     @Override
 487     public void resetStats() {
 488         if (this.session instanceof BGPSessionStats) {
 489             ((BGPSessionStats) this.session).resetBgpSessionStats();
 490         }
 491     }
 492
 493     @Override
 494     public BgpSessionState getBgpSessionState() {
 495         if (this.session instanceof BGPSessionStats) {
 496             return ((BGPSessionStats) this.session).getBgpSessionState();
 497         }
 498         return new BgpSessionState();
 499     }
 500
 501     @Override
 502     public synchronized BgpPeerState getBgpPeerState() {
 503         return this.peerStats.getBgpPeerState();
 504     }
 505
 506     @Override
 507     public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
 508         LOG.error("Transaction chain failed.", cause);
 509         this.chain.close();
 510         this.chain = this.rib.createPeerChain(this);
 511         this.ribWriter = AdjRibInWriter.create(this.rib.getYangRibId(), this.peerRole, this.simpleRoutingPolicy, this.chain);
 512         releaseConnection();
 513     }
 514
 515     @Override
 516     public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
 517         LOG.debug("Transaction chain {} successfull.", chain);
 518     }
 519
 520     @Override
 521     public void markUptodate(final TablesKey tablesKey) {
 522         this.ribWriter.markTableUptodate(tablesKey);
 523     }
 524
 525     private static Map<TablesKey, SendReceive> mapTableTypesFamilies(final List<AddressFamilies> addPathTablesType) {
 526         return ImmutableMap.copyOf(addPathTablesType.stream().collect(Collectors.toMap(af -> new TablesKey(af.getAfi(), af.getSafi()),
 527             BgpAddPathTableType::getSendReceive)));
 528     }
 529
 530     @Override
 531     public BGPErrorHandlingState getBGPErrorHandlingState() {
 532         return this;
 533     }
 534
 535     @Override
 536     public BGPAfiSafiState getBGPAfiSafiState() {
 537         return this;
 538     }
 539
 540     @Override
 541     public BGPSessionState getBGPSessionState() {
 542         if (this.session instanceof BGPSessionStateProvider) {
 543             return ((BGPSessionStateProvider) this.session).getBGPSessionState();
 544         }
 545         return null;
 546     }
 547
 548     @Override
 549     public BGPTimersState getBGPTimersState() {
 550         if (this.session instanceof BGPSessionStateProvider) {
 551             return ((BGPSessionStateProvider) this.session).getBGPTimersState();
 552         }
 553         return null;
 554     }
 555
 556     @Override
 557     public BGPTransportState getBGPTransportState() {
 558         if (this.session instanceof BGPSessionStateProvider) {
 559             return ((BGPSessionStateProvider) this.session).getBGPTransportState();
 560         }
 561         return null;
 562     }
 563 }