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

   1 /*
   2  * Copyright (c) 2013 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 io.netty.util.concurrent.Future;
  11
  12 import java.net.InetSocketAddress;
  13 import java.util.Comparator;
  14 import java.util.HashSet;
  15 import java.util.Set;
  16
  17 import javax.annotation.concurrent.GuardedBy;
  18
  19 import org.opendaylight.protocol.bgp.parser.BGPSession;
  20 import org.opendaylight.protocol.bgp.parser.BGPSessionListener;
  21 import org.opendaylight.protocol.bgp.parser.BGPTerminationReason;
  22 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionPreferences;
  23 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
  24 import org.opendaylight.protocol.bgp.rib.spi.Peer;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.AsNumber;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.PathAttributes;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
  30 import org.opendaylight.yangtools.yang.binding.Notification;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 import com.google.common.base.Objects;
  35 import com.google.common.base.Objects.ToStringHelper;
  36 import com.google.common.base.Preconditions;
  37
  38 /**
  39  * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
  40  * RIB actions.
  41  */
  42 public final class BGPPeer implements BGPSessionListener, Peer, AutoCloseable {
  43         private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
  44
  45         @GuardedBy("this")
  46         private final Set<TablesKey> tables = new HashSet<>();
  47         private final String name;
  48         private final RIB rib;
  49
  50         private Comparator<PathAttributes> comparator;
  51         private Future<Void> cf;
  52         private BGPSession session;
  53
  54         public BGPPeer(final String name, final InetSocketAddress address, final BGPSessionPreferences prefs,
  55                         final AsNumber remoteAs, final RIB rib) {
  56                 this.rib = Preconditions.checkNotNull(rib);
  57                 this.name = Preconditions.checkNotNull(name);
  58                 this.cf = rib.getDispatcher().createReconnectingClient(address, prefs, remoteAs, this, rib.getTcpStrategyFactory(), rib.getSessionStrategyFactory());
  59         }
  60
  61         @Override
  62         public synchronized void close() {
  63                 if (this.cf != null) {
  64                         this.cf.cancel(true);
  65                         if (this.session != null) {
  66                                 this.session.close();
  67                                 this.session = null;
  68                         }
  69                         this.cf = null;
  70                 }
  71         }
  72
  73         @Override
  74         public void onMessage(final BGPSession session, final Notification message) {
  75                 if (message instanceof Update) {
  76                         this.rib.updateTables(this, (Update) message);
  77                 } else {
  78                         LOG.info("Ignoring unhandled message class " + message.getClass());
  79                 }
  80         }
  81
  82         @Override
  83         public synchronized void onSessionUp(final BGPSession session) {
  84                 LOG.info("Session with peer {} went up with tables: {}", this.name, session.getAdvertisedTableTypes());
  85
  86                 this.session = session;
  87                 this.comparator = new BGPObjectComparator(this.rib.getLocalAs(), this.rib.getBgpIdentifier(), session.getBgpId());
  88
  89                 for (final BgpTableType t : session.getAdvertisedTableTypes()) {
  90                         final TablesKey key = new TablesKey(t.getAfi(), t.getSafi());
  91
  92                         this.tables.add(key);
  93                         this.rib.initTable(this, key);
  94                 }
  95         }
  96
  97         private synchronized void cleanup() {
  98                 // FIXME: BUG-196: support graceful restart
  99                 for (final TablesKey key : this.tables) {
 100                         this.rib.clearTable(this, key);
 101                 }
 102
 103                 this.tables.clear();
 104                 this.session = null;
 105                 this.comparator = null;
 106         }
 107
 108         @Override
 109         public void onSessionDown(final BGPSession session, final Exception e) {
 110                 LOG.info("Session with peer {} went down", this.name, e);
 111                 cleanup();
 112         }
 113
 114         @Override
 115         public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
 116                 LOG.info("Session with peer {} terminated: {}", this.name, cause);
 117                 cleanup();
 118         }
 119
 120         @Override
 121         public String toString() {
 122                 return addToStringAttributes(Objects.toStringHelper(this)).toString();
 123         }
 124
 125         protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
 126                 toStringHelper.add("name", this.name);
 127                 toStringHelper.add("tables", this.tables);
 128                 return toStringHelper;
 129         }
 130
 131         @Override
 132         public String getName() {
 133                 return this.name;
 134         }
 135
 136         @Override
 137         public Comparator<PathAttributes> getComparator() {
 138                 return this.comparator;
 139         }
 140 }