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.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.DestinationIpv4Builder;
42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
44 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;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes1;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes2;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.RouteRefresh;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlriBuilder;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlriBuilder;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.Ipv4AddressFamily;
63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.UnicastSubsequentAddressFamily;
65 import org.opendaylight.yangtools.yang.binding.Notification;
66 import org.slf4j.Logger;
67 import org.slf4j.LoggerFactory;
70 * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
73 public class BGPPeer implements BGPSessionListener, Peer, AutoCloseable, BGPPeerRuntimeMXBean, TransactionChainListener {
75 private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
78 private final Set<TablesKey> tables = new HashSet<>();
80 private BGPSession session;
82 private byte[] rawIdentifier;
84 private DOMTransactionChain chain;
86 private AdjRibInWriter ribWriter;
88 private final RIB rib;
89 private final String name;
90 private BGPPeerRuntimeRegistrator registrator;
91 private BGPPeerRuntimeRegistration runtimeReg;
92 private long sessionEstablishedCounter = 0L;
93 private final Map<TablesKey, AdjRibOutListener> adjRibOutListenerSet = new HashMap();
95 public BGPPeer(final String name, final RIB rib) {
96 this(name, rib, PeerRole.Ibgp);
99 public BGPPeer(final String name, final RIB rib, final PeerRole role) {
100 this.rib = Preconditions.checkNotNull(rib);
102 this.chain = rib.createPeerChain(this);
103 this.ribWriter = AdjRibInWriter.create(rib.getYangRibId(), role, this.chain);
107 public synchronized void close() {
113 public void onMessage(final BGPSession session, final Notification msg) {
114 if (!(msg instanceof Update) && !(msg instanceof RouteRefresh)) {
115 LOG.info("Ignoring unhandled message class {}", msg.getClass());
118 if (msg instanceof Update) {
119 onUpdateMessage((Update) msg);
121 onRouteRefreshMessage((RouteRefresh) msg, session);
125 private void onRouteRefreshMessage(final RouteRefresh message, final BGPSession session) {
126 final Class<? extends AddressFamily> rrAfi = message.getAfi();
127 final Class<? extends SubsequentAddressFamily> rrSafi = message.getSafi();
129 final TablesKey key = new TablesKey(rrAfi, rrSafi);
130 final AdjRibOutListener listener = this.adjRibOutListenerSet.get(key);
131 if (listener != null) {
133 this.adjRibOutListenerSet.remove(listener);
134 createAdjRibOutListener(RouterIds.createPeerId(session.getBgpId()), key, true);
136 LOG.info("Ignoring RouteRefresh message. Afi/Safi is not supported: {}, {}.", rrAfi, rrSafi);
140 private void onUpdateMessage(final Update message) {
142 final Attributes attrs = message.getAttributes();
143 MpReachNlri mpReach = null;
144 final boolean isAnyNlriAnnounced = message.getNlri() != null;
145 if (isAnyNlriAnnounced) {
146 mpReach = prefixesToMpReach(message);
147 } else if (attrs != null && attrs.getAugmentation(Attributes1.class) != null) {
148 mpReach = attrs.getAugmentation(Attributes1.class).getMpReachNlri();
150 if (mpReach != null) {
151 this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
153 MpUnreachNlri mpUnreach = null;
154 if (message.getWithdrawnRoutes() != null) {
155 mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
156 } else if (attrs != null && attrs.getAugmentation(Attributes2.class) != null) {
157 mpUnreach = attrs.getAugmentation(Attributes2.class).getMpUnreachNlri();
159 if (mpUnreach != null) {
160 this.ribWriter.removeRoutes(mpUnreach);
164 private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
165 if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
166 final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
167 attributesBuilder.setCNextHop(mpReach.getCNextHop());
168 return attributesBuilder.build();
174 * Creates MPReach for the prefixes to be handled in the same way as linkstate routes
176 * @param message Update message containing prefixes in NLRI
177 * @return MpReachNlri with prefixes from the nlri field
179 private static MpReachNlri prefixesToMpReach(final Update message) {
180 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
181 for (final Ipv4Prefix p : message.getNlri().getNlri()) {
182 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
184 final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
185 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
186 new AdvertizedRoutesBuilder().setDestinationType(
187 new DestinationIpv4CaseBuilder().setDestinationIpv4(
188 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
189 if (message.getAttributes() != null) {
190 b.setCNextHop(message.getAttributes().getCNextHop());
196 * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes
198 * @param message Update message containing withdrawn routes
199 * @param isAnyNlriAnnounced
200 * @return MpUnreachNlri with prefixes from the withdrawn routes field
202 private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
203 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
204 for (final Ipv4Prefix p : message.getWithdrawnRoutes().getWithdrawnRoutes()) {
205 boolean nlriAnounced = false;
206 if(isAnyNlriAnnounced) {
207 nlriAnounced = message.getNlri().getNlri().contains(p);
211 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
214 return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class).setWithdrawnRoutes(
215 new WithdrawnRoutesBuilder().setDestinationType(
216 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(
217 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
221 public synchronized void onSessionUp(final BGPSession session) {
222 LOG.info("Session with peer {} went up with tables: {}", this.name, session.getAdvertisedTableTypes());
223 this.session = session;
224 this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
225 final PeerId peerId = RouterIds.createPeerId(session.getBgpId());
226 createAdjRibOutListener(peerId);
228 this.ribWriter = this.ribWriter.transform(peerId, this.rib.getRibSupportContext(), this.tables, false);
229 this.sessionEstablishedCounter++;
230 if (this.registrator != null) {
231 this.runtimeReg = this.registrator.register(this);
235 private void createAdjRibOutListener(final PeerId peerId) {
236 for (final BgpTableType t : this.session.getAdvertisedTableTypes()) {
237 final TablesKey key = new TablesKey(t.getAfi(), t.getSafi());
238 if (this.tables.add(key)) {
239 createAdjRibOutListener(peerId, key, true);
243 addBgp4Support(peerId);
246 //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
247 private void addBgp4Support(final PeerId peerId) {
248 final TablesKey key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
249 if (this.tables.add(key)) {
250 createAdjRibOutListener(peerId, key, false);
254 private void createAdjRibOutListener(final PeerId peerId, final TablesKey key, final boolean mpSupport) {
255 final RIBSupportContext context = this.rib.getRibSupportContext().getRIBSupportContext(key);
257 // not particularly nice
258 if (context != null && this.session instanceof BGPSessionImpl) {
259 this.adjRibOutListenerSet.put(key, AdjRibOutListener.create(peerId, key, this.rib.getYangRibId(), this.rib.getCodecsRegistry(),
260 context.getRibSupport(), ((RIBImpl) this.rib).getService(), ((BGPSessionImpl) this.session).getLimiter(), mpSupport));
264 private synchronized void cleanup() {
265 // FIXME: BUG-196: support graceful
266 for (final AdjRibOutListener adjRibOutListener : this.adjRibOutListenerSet.values()) {
267 adjRibOutListener.close();
269 this.adjRibOutListenerSet.clear();
270 this.ribWriter.removePeer();
275 public void onSessionDown(final BGPSession session, final Exception e) {
276 if(e.getMessage().equals(BGPSessionImpl.END_OF_INPUT)) {
277 LOG.info("Session with peer {} went down", this.name);
279 LOG.info("Session with peer {} went down", this.name, e);
285 public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
286 LOG.info("Session with peer {} terminated: {}", this.name, cause);
291 public String toString() {
292 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
295 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
296 toStringHelper.add("name", this.name);
297 toStringHelper.add("tables", this.tables);
298 return toStringHelper;
302 public String getName() {
307 public void releaseConnection() {
308 addPeerToDisconnectedSharedList();
313 private void addPeerToDisconnectedSharedList() {
314 if(this.session != null) {
315 this.rib.getCacheDisconnectedPeers().insertDesconectedPeer(this.session.getBgpId());
320 private void dropConnection() {
321 if (this.runtimeReg != null) {
322 this.runtimeReg.close();
323 this.runtimeReg = null;
325 if (this.session != null) {
327 this.session.close();
328 } catch (final Exception e) {
329 LOG.warn("Error closing session with peer", e);
336 public boolean isSessionActive() {
337 return this.session != null;
341 public synchronized byte[] getRawIdentifier() {
342 return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
346 public void resetSession() {
351 public void resetStats() {
352 if (this.session instanceof BGPSessionStatistics) {
353 ((BGPSessionStatistics) this.session).resetSessionStats();
357 public synchronized void registerRootRuntimeBean(final BGPPeerRuntimeRegistrator registrator) {
358 this.registrator = registrator;
362 public BgpSessionState getBgpSessionState() {
363 if (this.session instanceof BGPSessionStatistics) {
364 return ((BGPSessionStatistics) this.session).getBgpSesionState();
366 return new BgpSessionState();
370 public synchronized BgpPeerState getBgpPeerState() {
371 final BgpPeerState peerState = new BgpPeerState();
372 final List<RouteTable> routes = Lists.newArrayList();
373 for (final TablesKey tablesKey : this.tables) {
374 final RouteTable routeTable = new RouteTable();
375 routeTable.setTableType("afi=" + tablesKey.getAfi().getSimpleName() + ",safi=" + tablesKey.getSafi().getSimpleName());
376 routeTable.setRoutesCount(this.rib.getRoutesCount(tablesKey));
377 routes.add(routeTable);
379 peerState.setRouteTable(routes);
380 peerState.setSessionEstablishedCount(this.sessionEstablishedCounter);
385 public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
386 LOG.error("Transaction chain failed.", cause);
389 this.chain = this.rib.createPeerChain(this);
393 public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
394 LOG.debug("Transaction chain {} successfull.", chain);
398 public void markUptodate(final TablesKey tablesKey) {
399 this.ribWriter.markTableUptodate(tablesKey);