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.controller.sal.binding.api.BindingAwareBroker.RoutedRpcRegistration;
34 import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
35 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionStatistics;
36 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
37 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
38 import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
39 import org.opendaylight.protocol.bgp.rib.spi.BGPSessionListener;
40 import org.opendaylight.protocol.bgp.rib.spi.BGPTerminationReason;
41 import org.opendaylight.protocol.bgp.rib.spi.Peer;
42 import org.opendaylight.protocol.bgp.rib.spi.RouterIds;
43 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.DestinationIpv4Builder;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
47 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;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes1;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes2;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.RouteRefresh;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.add.path.capability.AddressFamilies;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlriBuilder;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlriBuilder;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.peer.rpc.rev160322.BgpPeerRpcService;
63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.peer.rpc.rev160322.PeerContext;
64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
65 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.PeerKey;
67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
69 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.Ipv4AddressFamily;
70 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
71 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.UnicastSubsequentAddressFamily;
72 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
73 import org.opendaylight.yangtools.yang.binding.Notification;
74 import org.slf4j.Logger;
75 import org.slf4j.LoggerFactory;
78 * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
81 public class BGPPeer implements BGPSessionListener, Peer, AutoCloseable, BGPPeerRuntimeMXBean, TransactionChainListener {
83 private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
86 private final Set<TablesKey> tables = new HashSet<>();
88 private BGPSession session;
90 private byte[] rawIdentifier;
92 private DOMTransactionChain chain;
94 private AdjRibInWriter ribWriter;
96 private final RIB rib;
97 private final String name;
98 private BGPPeerRuntimeRegistrator registrator;
99 private BGPPeerRuntimeRegistration runtimeReg;
100 private long sessionEstablishedCounter = 0L;
101 private final Map<TablesKey, AdjRibOutListener> adjRibOutListenerSet = new HashMap();
102 private final RpcProviderRegistry rpcRegistry;
103 private RoutedRpcRegistration<BgpPeerRpcService> rpcRegistration;
104 private final PeerRole peerRole;
106 public BGPPeer(final String name, final RIB rib, final PeerRole role, final RpcProviderRegistry rpcRegistry) {
107 this.peerRole = role;
108 this.rib = Preconditions.checkNotNull(rib);
110 this.chain = rib.createPeerChain(this);
111 this.ribWriter = AdjRibInWriter.create(rib.getYangRibId(), role, this.chain);
112 this.rpcRegistry = rpcRegistry;
116 public synchronized void close() {
122 public void onMessage(final BGPSession session, final Notification msg) {
123 if (!(msg instanceof Update) && !(msg instanceof RouteRefresh)) {
124 LOG.info("Ignoring unhandled message class {}", msg.getClass());
127 if (msg instanceof Update) {
128 onUpdateMessage((Update) msg);
130 onRouteRefreshMessage((RouteRefresh) msg, session);
134 private void onRouteRefreshMessage(final RouteRefresh message, final BGPSession session) {
135 final Class<? extends AddressFamily> rrAfi = message.getAfi();
136 final Class<? extends SubsequentAddressFamily> rrSafi = message.getSafi();
138 final TablesKey key = new TablesKey(rrAfi, rrSafi);
139 final AdjRibOutListener listener = this.adjRibOutListenerSet.get(key);
140 if (listener != null) {
142 this.adjRibOutListenerSet.remove(listener);
143 createAdjRibOutListener(RouterIds.createPeerId(session.getBgpId()), key, true);
145 LOG.info("Ignoring RouteRefresh message. Afi/Safi is not supported: {}, {}.", rrAfi, rrSafi);
149 private void onUpdateMessage(final Update message) {
151 final Attributes attrs = message.getAttributes();
152 MpReachNlri mpReach = null;
153 final boolean isAnyNlriAnnounced = message.getNlri() != null;
154 if (isAnyNlriAnnounced) {
155 mpReach = prefixesToMpReach(message);
156 } else if (attrs != null && attrs.getAugmentation(Attributes1.class) != null) {
157 mpReach = attrs.getAugmentation(Attributes1.class).getMpReachNlri();
159 if (mpReach != null) {
160 this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
162 MpUnreachNlri mpUnreach = null;
163 if (message.getWithdrawnRoutes() != null) {
164 mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
165 } else if (attrs != null && attrs.getAugmentation(Attributes2.class) != null) {
166 mpUnreach = attrs.getAugmentation(Attributes2.class).getMpUnreachNlri();
168 if (mpUnreach != null) {
169 this.ribWriter.removeRoutes(mpUnreach);
173 private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
174 if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
175 final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
176 attributesBuilder.setCNextHop(mpReach.getCNextHop());
177 return attributesBuilder.build();
183 * Creates MPReach for the prefixes to be handled in the same way as linkstate routes
185 * @param message Update message containing prefixes in NLRI
186 * @return MpReachNlri with prefixes from the nlri field
188 private static MpReachNlri prefixesToMpReach(final Update message) {
189 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
190 for (final Ipv4Prefix p : message.getNlri().getNlri()) {
191 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
193 final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
194 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
195 new AdvertizedRoutesBuilder().setDestinationType(
196 new DestinationIpv4CaseBuilder().setDestinationIpv4(
197 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
198 if (message.getAttributes() != null) {
199 b.setCNextHop(message.getAttributes().getCNextHop());
205 * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes
207 * @param message Update message containing withdrawn routes
208 * @param isAnyNlriAnnounced
209 * @return MpUnreachNlri with prefixes from the withdrawn routes field
211 private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
212 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
213 for (final Ipv4Prefix p : message.getWithdrawnRoutes().getWithdrawnRoutes()) {
214 boolean nlriAnounced = false;
215 if(isAnyNlriAnnounced) {
216 nlriAnounced = message.getNlri().getNlri().contains(p);
220 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
223 return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class).setWithdrawnRoutes(
224 new WithdrawnRoutesBuilder().setDestinationType(
225 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(
226 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
230 public synchronized void onSessionUp(final BGPSession session) {
231 final List<AddressFamilies> addPathTablesType = session.getAdvertisedAddPathTableTypes();
232 LOG.info("Session with peer {} went up with tables {} and Add Path tables {}", this.name, addPathTablesType,
233 session.getAdvertisedAddPathTableTypes());
234 this.session = session;
236 this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
237 final PeerId peerId = RouterIds.createPeerId(session.getBgpId());
238 createAdjRibOutListener(peerId);
240 this.ribWriter = this.ribWriter.transform(peerId, this.rib.getRibSupportContext(), this.tables, addPathTablesType, false);
241 this.sessionEstablishedCounter++;
242 if (this.registrator != null) {
243 this.runtimeReg = this.registrator.register(this);
246 if (this.rpcRegistry != null) {
247 this.rpcRegistration = this.rpcRegistry.addRoutedRpcImplementation(BgpPeerRpcService.class, new BgpPeerRpc(session, this.tables));
248 final KeyedInstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer, PeerKey> path =
249 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));
250 this.rpcRegistration.registerPath(PeerContext.class, path);
254 private void createAdjRibOutListener(final PeerId peerId) {
255 for (final BgpTableType t : this.session.getAdvertisedTableTypes()) {
256 final TablesKey key = new TablesKey(t.getAfi(), t.getSafi());
257 if (this.tables.add(key)) {
258 createAdjRibOutListener(peerId, key, true);
262 addBgp4Support(peerId);
265 //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
266 private void addBgp4Support(final PeerId peerId) {
267 final TablesKey key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
268 if (this.tables.add(key)) {
269 createAdjRibOutListener(peerId, key, false);
273 private void createAdjRibOutListener(final PeerId peerId, final TablesKey key, final boolean mpSupport) {
274 final RIBSupportContext context = this.rib.getRibSupportContext().getRIBSupportContext(key);
276 // not particularly nice
277 if (context != null && this.session instanceof BGPSessionImpl) {
278 this.adjRibOutListenerSet.put(key, AdjRibOutListener.create(peerId, key, this.rib.getYangRibId(), this.rib.getCodecsRegistry(),
279 context.getRibSupport(), ((RIBImpl) this.rib).getService(), ((BGPSessionImpl) this.session).getLimiter(), mpSupport));
283 private synchronized void cleanup() {
284 // FIXME: BUG-196: support graceful
285 for (final AdjRibOutListener adjRibOutListener : this.adjRibOutListenerSet.values()) {
286 adjRibOutListener.close();
288 this.adjRibOutListenerSet.clear();
289 this.ribWriter.removePeer();
294 public void onSessionDown(final BGPSession session, final Exception e) {
295 if(e.getMessage().equals(BGPSessionImpl.END_OF_INPUT)) {
296 LOG.info("Session with peer {} went down", this.name);
298 LOG.info("Session with peer {} went down", this.name, e);
304 public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
305 LOG.info("Session with peer {} terminated: {}", this.name, cause);
310 public String toString() {
311 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
314 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
315 toStringHelper.add("name", this.name);
316 toStringHelper.add("tables", this.tables);
317 return toStringHelper;
321 public String getName() {
326 public void releaseConnection() {
327 if (this.rpcRegistration != null) {
328 this.rpcRegistration.close();
330 addPeerToDisconnectedSharedList();
335 private void addPeerToDisconnectedSharedList() {
336 if(this.session != null) {
337 this.rib.getCacheDisconnectedPeers().insertDesconectedPeer(this.session.getBgpId());
342 private void dropConnection() {
343 if (this.runtimeReg != null) {
344 this.runtimeReg.close();
345 this.runtimeReg = null;
347 if (this.session != null) {
349 this.session.close();
350 } catch (final Exception e) {
351 LOG.warn("Error closing session with peer", e);
358 public boolean isSessionActive() {
359 return this.session != null;
363 public synchronized byte[] getRawIdentifier() {
364 return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
368 public void resetSession() {
373 public void resetStats() {
374 if (this.session instanceof BGPSessionStatistics) {
375 ((BGPSessionStatistics) this.session).resetSessionStats();
379 public synchronized void registerRootRuntimeBean(final BGPPeerRuntimeRegistrator registrator) {
380 this.registrator = registrator;
384 public BgpSessionState getBgpSessionState() {
385 if (this.session instanceof BGPSessionStatistics) {
386 return ((BGPSessionStatistics) this.session).getBgpSesionState();
388 return new BgpSessionState();
392 public synchronized BgpPeerState getBgpPeerState() {
393 final BgpPeerState peerState = new BgpPeerState();
394 final List<RouteTable> routes = Lists.newArrayList();
395 for (final TablesKey tablesKey : this.tables) {
396 final RouteTable routeTable = new RouteTable();
397 routeTable.setTableType("afi=" + tablesKey.getAfi().getSimpleName() + ",safi=" + tablesKey.getSafi().getSimpleName());
398 routeTable.setRoutesCount(this.rib.getRoutesCount(tablesKey));
399 routes.add(routeTable);
401 peerState.setRouteTable(routes);
402 peerState.setSessionEstablishedCount(this.sessionEstablishedCounter);
407 public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
408 LOG.error("Transaction chain failed.", cause);
410 this.chain = this.rib.createPeerChain(this);
411 this.ribWriter = AdjRibInWriter.create(this.rib.getYangRibId(), this.peerRole, this.chain);
416 public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
417 LOG.debug("Transaction chain {} successfull.", chain);
421 public void markUptodate(final TablesKey tablesKey) {
422 this.ribWriter.markTableUptodate(tablesKey);