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;
105 public BGPPeer(final String name, final RIB rib, final PeerRole role, final RpcProviderRegistry rpcRegistry) {
106 this.rib = Preconditions.checkNotNull(rib);
108 this.chain = rib.createPeerChain(this);
109 this.ribWriter = AdjRibInWriter.create(rib.getYangRibId(), role, this.chain);
110 this.rpcRegistry = rpcRegistry;
114 public synchronized void close() {
120 public void onMessage(final BGPSession session, final Notification msg) {
121 if (!(msg instanceof Update) && !(msg instanceof RouteRefresh)) {
122 LOG.info("Ignoring unhandled message class {}", msg.getClass());
125 if (msg instanceof Update) {
126 onUpdateMessage((Update) msg);
128 onRouteRefreshMessage((RouteRefresh) msg, session);
132 private void onRouteRefreshMessage(final RouteRefresh message, final BGPSession session) {
133 final Class<? extends AddressFamily> rrAfi = message.getAfi();
134 final Class<? extends SubsequentAddressFamily> rrSafi = message.getSafi();
136 final TablesKey key = new TablesKey(rrAfi, rrSafi);
137 final AdjRibOutListener listener = this.adjRibOutListenerSet.get(key);
138 if (listener != null) {
140 this.adjRibOutListenerSet.remove(listener);
141 createAdjRibOutListener(RouterIds.createPeerId(session.getBgpId()), key, true);
143 LOG.info("Ignoring RouteRefresh message. Afi/Safi is not supported: {}, {}.", rrAfi, rrSafi);
147 private void onUpdateMessage(final Update message) {
149 final Attributes attrs = message.getAttributes();
150 MpReachNlri mpReach = null;
151 final boolean isAnyNlriAnnounced = message.getNlri() != null;
152 if (isAnyNlriAnnounced) {
153 mpReach = prefixesToMpReach(message);
154 } else if (attrs != null && attrs.getAugmentation(Attributes1.class) != null) {
155 mpReach = attrs.getAugmentation(Attributes1.class).getMpReachNlri();
157 if (mpReach != null) {
158 this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
160 MpUnreachNlri mpUnreach = null;
161 if (message.getWithdrawnRoutes() != null) {
162 mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
163 } else if (attrs != null && attrs.getAugmentation(Attributes2.class) != null) {
164 mpUnreach = attrs.getAugmentation(Attributes2.class).getMpUnreachNlri();
166 if (mpUnreach != null) {
167 this.ribWriter.removeRoutes(mpUnreach);
171 private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
172 if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
173 final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
174 attributesBuilder.setCNextHop(mpReach.getCNextHop());
175 return attributesBuilder.build();
181 * Creates MPReach for the prefixes to be handled in the same way as linkstate routes
183 * @param message Update message containing prefixes in NLRI
184 * @return MpReachNlri with prefixes from the nlri field
186 private static MpReachNlri prefixesToMpReach(final Update message) {
187 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
188 for (final Ipv4Prefix p : message.getNlri().getNlri()) {
189 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
191 final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
192 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
193 new AdvertizedRoutesBuilder().setDestinationType(
194 new DestinationIpv4CaseBuilder().setDestinationIpv4(
195 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
196 if (message.getAttributes() != null) {
197 b.setCNextHop(message.getAttributes().getCNextHop());
203 * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes
205 * @param message Update message containing withdrawn routes
206 * @param isAnyNlriAnnounced
207 * @return MpUnreachNlri with prefixes from the withdrawn routes field
209 private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
210 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
211 for (final Ipv4Prefix p : message.getWithdrawnRoutes().getWithdrawnRoutes()) {
212 boolean nlriAnounced = false;
213 if(isAnyNlriAnnounced) {
214 nlriAnounced = message.getNlri().getNlri().contains(p);
218 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
221 return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class).setWithdrawnRoutes(
222 new WithdrawnRoutesBuilder().setDestinationType(
223 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(
224 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
228 public synchronized void onSessionUp(final BGPSession session) {
229 final List<AddressFamilies> addPathTablesType = session.getAdvertisedAddPathTableTypes();
230 LOG.info("Session with peer {} went up with tables {} and Add Path tables {}", this.name, addPathTablesType,
231 session.getAdvertisedAddPathTableTypes());
232 this.session = session;
234 this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
235 final PeerId peerId = RouterIds.createPeerId(session.getBgpId());
236 createAdjRibOutListener(peerId);
238 this.ribWriter = this.ribWriter.transform(peerId, this.rib.getRibSupportContext(), this.tables, addPathTablesType, false);
239 this.sessionEstablishedCounter++;
240 if (this.registrator != null) {
241 this.runtimeReg = this.registrator.register(this);
244 if (this.rpcRegistry != null) {
245 this.rpcRegistration = this.rpcRegistry.addRoutedRpcImplementation(BgpPeerRpcService.class, new BgpPeerRpc(session, this.tables));
246 final KeyedInstanceIdentifier<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.bgp.rib.rib.Peer, PeerKey> path =
247 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));
248 this.rpcRegistration.registerPath(PeerContext.class, path);
252 private void createAdjRibOutListener(final PeerId peerId) {
253 for (final BgpTableType t : this.session.getAdvertisedTableTypes()) {
254 final TablesKey key = new TablesKey(t.getAfi(), t.getSafi());
255 if (this.tables.add(key)) {
256 createAdjRibOutListener(peerId, key, true);
260 addBgp4Support(peerId);
263 //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
264 private void addBgp4Support(final PeerId peerId) {
265 final TablesKey key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
266 if (this.tables.add(key)) {
267 createAdjRibOutListener(peerId, key, false);
271 private void createAdjRibOutListener(final PeerId peerId, final TablesKey key, final boolean mpSupport) {
272 final RIBSupportContext context = this.rib.getRibSupportContext().getRIBSupportContext(key);
274 // not particularly nice
275 if (context != null && this.session instanceof BGPSessionImpl) {
276 this.adjRibOutListenerSet.put(key, AdjRibOutListener.create(peerId, key, this.rib.getYangRibId(), this.rib.getCodecsRegistry(),
277 context.getRibSupport(), ((RIBImpl) this.rib).getService(), ((BGPSessionImpl) this.session).getLimiter(), mpSupport));
281 private synchronized void cleanup() {
282 // FIXME: BUG-196: support graceful
283 for (final AdjRibOutListener adjRibOutListener : this.adjRibOutListenerSet.values()) {
284 adjRibOutListener.close();
286 this.adjRibOutListenerSet.clear();
287 this.ribWriter.removePeer();
292 public void onSessionDown(final BGPSession session, final Exception e) {
293 if(e.getMessage().equals(BGPSessionImpl.END_OF_INPUT)) {
294 LOG.info("Session with peer {} went down", this.name);
296 LOG.info("Session with peer {} went down", this.name, e);
302 public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
303 LOG.info("Session with peer {} terminated: {}", this.name, cause);
308 public String toString() {
309 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
312 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
313 toStringHelper.add("name", this.name);
314 toStringHelper.add("tables", this.tables);
315 return toStringHelper;
319 public String getName() {
324 public void releaseConnection() {
325 if (this.rpcRegistration != null) {
326 this.rpcRegistration.close();
328 addPeerToDisconnectedSharedList();
333 private void addPeerToDisconnectedSharedList() {
334 if(this.session != null) {
335 this.rib.getCacheDisconnectedPeers().insertDesconectedPeer(this.session.getBgpId());
340 private void dropConnection() {
341 if (this.runtimeReg != null) {
342 this.runtimeReg.close();
343 this.runtimeReg = null;
345 if (this.session != null) {
347 this.session.close();
348 } catch (final Exception e) {
349 LOG.warn("Error closing session with peer", e);
356 public boolean isSessionActive() {
357 return this.session != null;
361 public synchronized byte[] getRawIdentifier() {
362 return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
366 public void resetSession() {
371 public void resetStats() {
372 if (this.session instanceof BGPSessionStatistics) {
373 ((BGPSessionStatistics) this.session).resetSessionStats();
377 public synchronized void registerRootRuntimeBean(final BGPPeerRuntimeRegistrator registrator) {
378 this.registrator = registrator;
382 public BgpSessionState getBgpSessionState() {
383 if (this.session instanceof BGPSessionStatistics) {
384 return ((BGPSessionStatistics) this.session).getBgpSesionState();
386 return new BgpSessionState();
390 public synchronized BgpPeerState getBgpPeerState() {
391 final BgpPeerState peerState = new BgpPeerState();
392 final List<RouteTable> routes = Lists.newArrayList();
393 for (final TablesKey tablesKey : this.tables) {
394 final RouteTable routeTable = new RouteTable();
395 routeTable.setTableType("afi=" + tablesKey.getAfi().getSimpleName() + ",safi=" + tablesKey.getSafi().getSimpleName());
396 routeTable.setRoutesCount(this.rib.getRoutesCount(tablesKey));
397 routes.add(routeTable);
399 peerState.setRouteTable(routes);
400 peerState.setSessionEstablishedCount(this.sessionEstablishedCounter);
405 public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
406 LOG.error("Transaction chain failed.", cause);
409 this.chain = this.rib.createPeerChain(this);
413 public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
414 LOG.debug("Transaction chain {} successfull.", chain);
418 public void markUptodate(final TablesKey tablesKey) {
419 this.ribWriter.markTableUptodate(tablesKey);