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.HashSet;
18 import java.util.List;
20 import javax.annotation.concurrent.GuardedBy;
21 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeMXBean;
22 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistration;
23 import org.opendaylight.controller.config.yang.bgp.rib.impl.BGPPeerRuntimeRegistrator;
24 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpPeerState;
25 import org.opendaylight.controller.config.yang.bgp.rib.impl.BgpSessionState;
26 import org.opendaylight.controller.config.yang.bgp.rib.impl.RouteTable;
27 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;
28 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;
29 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
30 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
31 import org.opendaylight.protocol.bgp.rib.impl.spi.BGPSessionStatistics;
32 import org.opendaylight.protocol.bgp.rib.impl.spi.RIB;
33 import org.opendaylight.protocol.bgp.rib.impl.spi.RIBSupportContext;
34 import org.opendaylight.protocol.bgp.rib.spi.BGPSession;
35 import org.opendaylight.protocol.bgp.rib.spi.BGPSessionListener;
36 import org.opendaylight.protocol.bgp.rib.spi.BGPTerminationReason;
37 import org.opendaylight.protocol.bgp.rib.spi.Peer;
38 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.DestinationIpv4Builder;
40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4PrefixesBuilder;
42 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;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Update;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.Attributes;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.path.attributes.AttributesBuilder;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes1;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.Attributes2;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlri;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpReachNlriBuilder;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlri;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.MpUnreachNlriBuilder;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerId;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.PeerRole;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.TablesKey;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.Ipv4AddressFamily;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.UnicastSubsequentAddressFamily;
60 import org.opendaylight.yangtools.yang.binding.Notification;
61 import org.slf4j.Logger;
62 import org.slf4j.LoggerFactory;
65 * Class representing a peer. We have a single instance for each peer, which provides translation from BGP events into
68 public class BGPPeer implements BGPSessionListener, Peer, AutoCloseable, BGPPeerRuntimeMXBean, TransactionChainListener {
70 private static final Logger LOG = LoggerFactory.getLogger(BGPPeer.class);
73 private final Set<TablesKey> tables = new HashSet<>();
75 private BGPSession session;
77 private byte[] rawIdentifier;
79 private DOMTransactionChain chain;
81 private AdjRibInWriter ribWriter;
83 private final RIB rib;
84 private final String name;
85 private BGPPeerRuntimeRegistrator registrator;
86 private BGPPeerRuntimeRegistration runtimeReg;
87 private long sessionEstablishedCounter = 0L;
89 public BGPPeer(final String name, final RIB rib) {
90 this(name, rib, PeerRole.Ibgp);
93 public BGPPeer(final String name, final RIB rib, final PeerRole role) {
94 this.rib = Preconditions.checkNotNull(rib);
96 this.chain = rib.createPeerChain(this);
97 this.ribWriter = AdjRibInWriter.create(rib.getYangRibId(), role, this.chain);
101 public synchronized void close() {
104 // TODO should this perform cleanup ?
108 public void onMessage(final BGPSession session, final Notification msg) {
109 if (!(msg instanceof Update)) {
110 LOG.info("Ignoring unhandled message class {}", msg.getClass());
113 final Update message = (Update) msg;
116 final Attributes attrs = message.getAttributes();
117 MpReachNlri mpReach = null;
118 final boolean isAnyNlriAnnounced = message.getNlri() != null;
119 if (isAnyNlriAnnounced) {
120 mpReach = prefixesToMpReach(message);
121 } else if (attrs != null && attrs.getAugmentation(Attributes1.class) != null) {
122 mpReach = attrs.getAugmentation(Attributes1.class).getMpReachNlri();
124 if (mpReach != null) {
125 this.ribWriter.updateRoutes(mpReach, nextHopToAttribute(attrs, mpReach));
127 MpUnreachNlri mpUnreach = null;
128 if (message.getWithdrawnRoutes() != null) {
129 mpUnreach = prefixesToMpUnreach(message, isAnyNlriAnnounced);
130 } else if (attrs != null && attrs.getAugmentation(Attributes2.class) != null) {
131 mpUnreach = attrs.getAugmentation(Attributes2.class).getMpUnreachNlri();
133 if (mpUnreach != null) {
134 this.ribWriter.removeRoutes(mpUnreach);
138 private static Attributes nextHopToAttribute(final Attributes attrs, final MpReachNlri mpReach) {
139 if (attrs.getCNextHop() == null && mpReach.getCNextHop() != null) {
140 final AttributesBuilder attributesBuilder = new AttributesBuilder(attrs);
141 attributesBuilder.setCNextHop(mpReach.getCNextHop());
142 return attributesBuilder.build();
148 * Creates MPReach for the prefixes to be handled in the same way as linkstate routes
150 * @param message Update message containing prefixes in NLRI
151 * @return MpReachNlri with prefixes from the nlri field
153 private static MpReachNlri prefixesToMpReach(final Update message) {
154 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
155 for (final Ipv4Prefix p : message.getNlri().getNlri()) {
156 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
158 final MpReachNlriBuilder b = new MpReachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(
159 UnicastSubsequentAddressFamily.class).setAdvertizedRoutes(
160 new AdvertizedRoutesBuilder().setDestinationType(
161 new DestinationIpv4CaseBuilder().setDestinationIpv4(
162 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build());
163 if (message.getAttributes() != null) {
164 b.setCNextHop(message.getAttributes().getCNextHop());
170 * Create MPUnreach for the prefixes to be handled in the same way as linkstate routes
172 * @param message Update message containing withdrawn routes
173 * @param isAnyNlriAnnounced
174 * @return MpUnreachNlri with prefixes from the withdrawn routes field
176 private static MpUnreachNlri prefixesToMpUnreach(final Update message, final boolean isAnyNlriAnnounced) {
177 final List<Ipv4Prefixes> prefixes = new ArrayList<>();
178 for (final Ipv4Prefix p : message.getWithdrawnRoutes().getWithdrawnRoutes()) {
179 boolean nlriAnounced = false;
180 if(isAnyNlriAnnounced) {
181 nlriAnounced = message.getNlri().getNlri().contains(p);
185 prefixes.add(new Ipv4PrefixesBuilder().setPrefix(p).build());
188 return new MpUnreachNlriBuilder().setAfi(Ipv4AddressFamily.class).setSafi(UnicastSubsequentAddressFamily.class).setWithdrawnRoutes(
189 new WithdrawnRoutesBuilder().setDestinationType(
190 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(
191 new DestinationIpv4Builder().setIpv4Prefixes(prefixes).build()).build()).build()).build();
195 public synchronized void onSessionUp(final BGPSession session) {
196 LOG.info("Session with peer {} went up with tables: {}", this.name, session.getAdvertisedTableTypes());
197 this.session = session;
198 this.rawIdentifier = InetAddresses.forString(session.getBgpId().getValue()).getAddress();
199 final PeerId peerId = RouterIds.createPeerId(session.getBgpId());
201 for (final BgpTableType t : session.getAdvertisedTableTypes()) {
202 final TablesKey key = new TablesKey(t.getAfi(), t.getSafi());
203 if (this.tables.add(key)) {
204 createAdjRibOutListener(peerId, key, true);
208 addBgp4Support(peerId);
210 this.ribWriter = this.ribWriter.transform(peerId, this.rib.getRibSupportContext(), this.tables, false);
211 this.sessionEstablishedCounter++;
212 if (this.registrator != null) {
213 this.runtimeReg = this.registrator.register(this);
217 //try to add a support for old-school BGP-4, if peer did not advertise IPv4-Unicast MP capability
218 private void addBgp4Support(final PeerId peerId) {
219 final TablesKey key = new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class);
220 if (this.tables.add(key)) {
221 createAdjRibOutListener(peerId, key, false);
225 private void createAdjRibOutListener(final PeerId peerId, final TablesKey key, final boolean mpSupport) {
226 final RIBSupportContext context = this.rib.getRibSupportContext().getRIBSupportContext(key);
228 // not particularly nice
229 if (context != null && this.session instanceof BGPSessionImpl) {
230 AdjRibOutListener.create(peerId, key, this.rib.getYangRibId(), this.rib.getCodecsRegistry(), context.getRibSupport(), ((RIBImpl) this.rib).getService(),
231 ((BGPSessionImpl) this.session).getLimiter(), mpSupport);
235 private synchronized void cleanup() {
236 // FIXME: BUG-196: support graceful restart
237 this.ribWriter.cleanTables(this.tables);
242 public void onSessionDown(final BGPSession session, final Exception e) {
243 LOG.info("Session with peer {} went down", this.name, e);
248 public void onSessionTerminated(final BGPSession session, final BGPTerminationReason cause) {
249 LOG.info("Session with peer {} terminated: {}", this.name, cause);
254 public String toString() {
255 return addToStringAttributes(MoreObjects.toStringHelper(this)).toString();
258 protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
259 toStringHelper.add("name", this.name);
260 toStringHelper.add("tables", this.tables);
261 return toStringHelper;
265 public String getName() {
270 public void releaseConnection() {
276 private void dropConnection() {
277 if (this.runtimeReg != null) {
278 this.runtimeReg.close();
279 this.runtimeReg = null;
281 if (this.session != null) {
283 this.session.close();
284 } catch (final Exception e) {
285 LOG.warn("Error closing session with peer", e);
292 public boolean isSessionActive() {
293 return this.session != null;
297 public synchronized byte[] getRawIdentifier() {
298 return Arrays.copyOf(this.rawIdentifier, this.rawIdentifier.length);
302 public void resetSession() {
307 public void resetStats() {
308 if (this.session instanceof BGPSessionStatistics) {
309 ((BGPSessionStatistics) this.session).resetSessionStats();
313 public synchronized void registerRootRuntimeBean(final BGPPeerRuntimeRegistrator registrator) {
314 this.registrator = registrator;
318 public BgpSessionState getBgpSessionState() {
319 if (this.session instanceof BGPSessionStatistics) {
320 return ((BGPSessionStatistics) this.session).getBgpSesionState();
322 return new BgpSessionState();
326 public synchronized BgpPeerState getBgpPeerState() {
327 final BgpPeerState peerState = new BgpPeerState();
328 final List<RouteTable> routes = Lists.newArrayList();
329 for (final TablesKey tablesKey : this.tables) {
330 final RouteTable routeTable = new RouteTable();
331 routeTable.setTableType("afi=" + tablesKey.getAfi().getSimpleName() + ",safi=" + tablesKey.getSafi().getSimpleName());
332 routeTable.setRoutesCount(this.rib.getRoutesCount(tablesKey));
333 routes.add(routeTable);
335 peerState.setRouteTable(routes);
336 peerState.setSessionEstablishedCount(this.sessionEstablishedCounter);
341 public void onTransactionChainFailed(final TransactionChain<?, ?> chain, final AsyncTransaction<?, ?> transaction, final Throwable cause) {
342 LOG.error("Transaction chain failed.", cause);
345 this.chain = this.rib.createPeerChain(this);
349 public void onTransactionChainSuccessful(final TransactionChain<?, ?> chain) {
350 LOG.debug("Transaction chain {} successfull.", chain);
354 public void markUptodate(final TablesKey tablesKey) {
355 this.ribWriter.markTableUptodate(tablesKey);