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 com.google.common.base.MoreObjects;
11 import com.google.common.base.MoreObjects.ToStringHelper;
12 import com.google.common.base.Preconditions;
13 import com.google.common.collect.Lists;
14 import com.google.common.net.InetAddresses;
15 import java.util.ArrayList;
16 import java.util.Arrays;
17 import java.util.HashMap;
18 import java.util.HashSet;
19 import java.util.List;
22 import javax.annotation.concurrent.GuardedBy;
23 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeMXBean;
24 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistration;
25 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistrator;
26 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpPeerState;
27 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpSessionState;
28 import org.opendaylight.controller.config.yang.bgp.rib.impl.RouteTable;
29 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
30 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
31 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
32 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
33 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionStatistics;
34 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
35 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
36 import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
37 import org.opendaylight.protocol.bgp.rib.spi.BGPSessionListener;
38 import org.opendaylight.protocol.bgp.rib.spi.BGPTerminationReason;
39 import org.opendaylight.protocol.bgp.rib.spi.Peer;
40 import org.opendaylight.protocol.bgp.rib.spi.RouterIds;
41 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.DestinationIpv4Builder;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
45 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;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes1;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes2;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.RouteRefresh;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlriBuilder;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlriBuilder;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.Ipv4AddressFamily;
64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
65 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.UnicastSubsequentAddressFamily;
66 import org.opendaylight.yangtools.yang.binding.Notification;
67 import org.slf4j.Logger;
68 import org.slf4j.LoggerFactory;
71 * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
74 public class BGPPeer implements BGPSessionListener, Peer, AutoCloseable, BGPPeerRuntimeMXBean, TransactionChainListener {
76 private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
79 private final Set<TablesKey> tables = new HashSet<>();
81 private BGPSession session;
83 private byte[] rawIdentifier;
85 private DOMTransactionChain chain;
87 private AdjRibInWriter ribWriter;
89 private final RIB rib;
90 private final String name;
91 private BGPPeerRuntimeRegistrator registrator;
92 private BGPPeerRuntimeRegistration runtimeReg;
93 private long sessionEstablishedCounter = 0L;
94 private final Map<TablesKey, AdjRibOutListener> adjRibOutListenerSet = new HashMap();
96 public BGPPeer(final String name, final RIB rib) {
97 this(name, rib, PeerRole.Ibgp);
100 public BGPPeer(final String name, final RIB rib, final PeerRole role) {
101 this.rib = Preconditions.checkNotNull(rib);
103 this.chain = rib.createPeerChain(this);
104 this.ribWriter = AdjRibInWriter.create(rib.getYangRibId(), role, this.chain);
108 public synchronized void close() {
114 public void onMessage(final BGPSession session, final Notification msg) {
115 if (!(msg instanceof Update) && !(msg instanceof RouteRefresh)) {
116 LOG.info("Ignoring unhandled message class {}", msg.getClass());
119 if (msg instanceof Update) {
120 onUpdateMessage((Update) msg);
122 onRouteRefreshMessage((RouteRefresh) msg, session);
126 private void onRouteRefreshMessage(final RouteRefresh message, final BGPSession session) {
127 final Class<? extends AddressFamily> rrAfi = message.getAfi();
128 final Class<? extends SubsequentAddressFamily> rrSafi = message.getSafi();
130 final TablesKey key = new TablesKey(rrAfi, rrSafi);
131 final AdjRibOutListener listener = this.adjRibOutListenerSet.get(key);
132 if (listener != null) {
134 this.adjRibOutListenerSet.remove(listener);
135 createAdjRibOutListener(RouterIds.createPeerId(session.getBgpId()), key, true);
137 LOG.info("Ignoring RouteRefresh message. Afi/Safi is not supported: {}, {}.", rrAfi, rrSafi);
141 private void onUpdateMessage(final Update message) {
143 final Attributes attrs = message.getAttributes();
144 MpReachNlri mpReach = null;
145 final boolean isAnyNlriAnnounced = message.getNlri() != null;
146 if (isAnyNlriAnnounced) {
147 mpReach = prefixesToMpReach(message);
148 } else if (attrs != null && attrs.getAugmentation(Attributes1.class) != null) {
149 mpReach = attrs.getAugmentation(Attributes1.class).getMpReachNlri();
151 if (mpReach != null) {
152 this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
154 MpUnreachNlri mpUnreach = null;
155 if (message.getWithdrawnRoutes() != null) {
156 mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
157 } else if (attrs != null && attrs.getAugmentation(Attributes2.class) != null) {
158 mpUnreach = attrs.getAugmentation(Attributes2.class).getMpUnreachNlri();
160 if (mpUnreach != null) {
161 this.ribWriter.removeRoutes(mpUnreach);
165 private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
166 if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
167 final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
168 attributesBuilder.setCNextHop(mpReach.getCNextHop());
169 return attributesBuilder.build();
175 * Creates MPReach for the prefixes to be handled in the same way as linkstate routes
177 * @param message Update message containing prefixes in NLRI
178 * @return MpReachNlri with prefixes from the nlri field
180 private static MpReachNlri prefixesToMpReach(final Update message) {
181 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
182 for (final Ipv4Prefix p : message.getNlri().getNlri()) {
183 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
185 final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
186 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
187 new AdvertizedRoutesBuilder().setDestinationType(
188 new DestinationIpv4CaseBuilder().setDestinationIpv4(
189 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
190 if (message.getAttributes() != null) {
191 b.setCNextHop(message.getAttributes().getCNextHop());
197 * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes
199 * @param message Update message containing withdrawn routes
200 * @param isAnyNlriAnnounced
201 * @return MpUnreachNlri with prefixes from the withdrawn routes field
203 private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
204 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
205 for (final Ipv4Prefix p : message.getWithdrawnRoutes().getWithdrawnRoutes()) {
206 boolean nlriAnounced = false;
207 if(isAnyNlriAnnounced) {
208 nlriAnounced = message.getNlri().getNlri().contains(p);
212 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
215 return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class).setWithdrawnRoutes(
216 new WithdrawnRoutesBuilder().setDestinationType(
217 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(
218 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
222 public synchronized void onSessionUp(final BGPSession session) {
223 LOG.info("Session with peer {} went up with tables: {}", this.name, session.getAdvertisedTableTypes());
224 this.session = session;
225 this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
226 final PeerId peerId = RouterIds.createPeerId(session.getBgpId());
227 createAdjRibOutListener(peerId);
229 this.ribWriter = this.ribWriter.transform(peerId, this.rib.getRibSupportContext(), this.tables, false);
230 this.sessionEstablishedCounter++;
231 if (this.registrator != null) {
232 this.runtimeReg = this.registrator.register(this);
236 private void createAdjRibOutListener(final PeerId peerId) {
237 for (final BgpTableType t : this.session.getAdvertisedTableTypes()) {
238 final TablesKey key = new TablesKey(t.getAfi(), t.getSafi());
239 if (this.tables.add(key)) {
240 createAdjRibOutListener(peerId, key, true);
244 addBgp4Support(peerId);
247 //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
248 private void addBgp4Support(final PeerId peerId) {
249 final TablesKey key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
250 if (this.tables.add(key)) {
251 createAdjRibOutListener(peerId, key, false);
255 private void createAdjRibOutListener(final PeerId peerId, final TablesKey key, final boolean mpSupport) {
256 final RIBSupportContext context = this.rib.getRibSupportContext().getRIBSupportContext(key);
258 // not particularly nice
259 if (context != null && this.session instanceof BGPSessionImpl) {
260 this.adjRibOutListenerSet.put(key, AdjRibOutListener.create(peerId, key, this.rib.getYangRibId(), this.rib.getCodecsRegistry(),
261 context.getRibSupport(), ((RIBImpl) this.rib).getService(), ((BGPSessionImpl) this.session).getLimiter(), mpSupport));
265 private synchronized void cleanup() {
266 // FIXME: BUG-196: support graceful
267 for (final AdjRibOutListener adjRibOutListener : this.adjRibOutListenerSet.values()) {
268 adjRibOutListener.close();
270 this.adjRibOutListenerSet.clear();
271 this.ribWriter.removePeer();
276 public void onSessionDown(final BGPSession session, final Exception e) {
277 if(e.getMessage().equals(BGPSessionImpl.END_OF_INPUT)) {
278 LOG.info("Session with peer {} went down", this.name);
280 LOG.info("Session with peer {} went down", this.name, e);
286 public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
287 LOG.info("Session with peer {} terminated: {}", this.name, cause);
292 public String toString() {
293 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
296 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
297 toStringHelper.add("name", this.name);
298 toStringHelper.add("tables", this.tables);
299 return toStringHelper;
303 public String getName() {
308 public void releaseConnection() {
309 addPeerToDisconnectedSharedList();
314 private void addPeerToDisconnectedSharedList() {
315 if(this.session != null) {
316 this.rib.getCacheDisconnectedPeers().insertDesconectedPeer(this.session.getBgpId());
321 private void dropConnection() {
322 if (this.runtimeReg != null) {
323 this.runtimeReg.close();
324 this.runtimeReg = null;
326 if (this.session != null) {
328 this.session.close();
329 } catch (final Exception e) {
330 LOG.warn("Error closing session with peer", e);
337 public boolean isSessionActive() {
338 return this.session != null;
342 public synchronized byte[] getRawIdentifier() {
343 return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
347 public void resetSession() {
352 public void resetStats() {
353 if (this.session instanceof BGPSessionStatistics) {
354 ((BGPSessionStatistics) this.session).resetSessionStats();
358 public synchronized void registerRootRuntimeBean(final BGPPeerRuntimeRegistrator registrator) {
359 this.registrator = registrator;
363 public BgpSessionState getBgpSessionState() {
364 if (this.session instanceof BGPSessionStatistics) {
365 return ((BGPSessionStatistics) this.session).getBgpSesionState();
367 return new BgpSessionState();
371 public synchronized BgpPeerState getBgpPeerState() {
372 final BgpPeerState peerState = new BgpPeerState();
373 final List<RouteTable> routes = Lists.newArrayList();
374 for (final TablesKey tablesKey : this.tables) {
375 final RouteTable routeTable = new RouteTable();
376 routeTable.setTableType("afi=" + tablesKey.getAfi().getSimpleName() + ",safi=" + tablesKey.getSafi().getSimpleName());
377 routeTable.setRoutesCount(this.rib.getRoutesCount(tablesKey));
378 routes.add(routeTable);
380 peerState.setRouteTable(routes);
381 peerState.setSessionEstablishedCount(this.sessionEstablishedCounter);
386 public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
387 LOG.error("Transaction chain failed.", cause);
390 this.chain = this.rib.createPeerChain(this);
394 public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
395 LOG.debug("Transaction chain {} successfull.", chain);
399 public void markUptodate(final TablesKey tablesKey) {
400 this.ribWriter.markTableUptodate(tablesKey);