2 * Copyright (c) 2016 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.evpn.impl.nlri;
10 import static org.opendaylight.bgp.concepts.RouteDistinguisherUtil.parseRouteDistinguisher;
11 import static org.opendaylight.bgp.concepts.RouteDistinguisherUtil.serializeRouteDistinquisher;
12 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.extractRouteDistinguisher;
14 import com.google.common.base.Preconditions;
15 import io.netty.buffer.ByteBuf;
16 import io.netty.buffer.Unpooled;
17 import java.util.ArrayList;
18 import java.util.List;
19 import javax.annotation.Nullable;
20 import org.opendaylight.protocol.bgp.evpn.spi.EvpnRegistry;
21 import org.opendaylight.protocol.bgp.evpn.spi.pojo.SimpleEvpnNlriRegistry;
22 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
23 import org.opendaylight.protocol.bgp.parser.spi.NlriParser;
24 import org.opendaylight.protocol.bgp.parser.spi.NlriSerializer;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.NlriType;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.evpn.EvpnChoice;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.evpn.destination.EvpnDestination;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.evpn.destination.EvpnDestinationBuilder;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationEvpnCase;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.update.attributes.mp.reach.nlri.advertized.routes.destination.type.DestinationEvpnCaseBuilder;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.update.attributes.mp.reach.nlri.advertized.routes.destination.type.destination.evpn._case.DestinationEvpnBuilder;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.path.attributes.Attributes;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.Attributes1;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.Attributes2;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.MpReachNlriBuilder;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.MpUnreachNlri;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.MpUnreachNlriBuilder;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.reach.nlri.AdvertizedRoutes;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.reach.nlri.AdvertizedRoutesBuilder;
40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.unreach.nlri.WithdrawnRoutes;
41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.update.attributes.mp.unreach.nlri.WithdrawnRoutesBuilder;
42 import org.opendaylight.yangtools.yang.binding.DataObject;
43 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
44 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
45 import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
46 import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
47 import org.slf4j.Logger;
48 import org.slf4j.LoggerFactory;
50 public final class EvpnNlriParser implements NlriParser, NlriSerializer {
51 private static final Logger LOG = LoggerFactory.getLogger(EvpnNlriParser.class);
52 private static final NodeIdentifier EVPN_CHOICE_NID = new NodeIdentifier(EvpnChoice.QNAME);
55 private interface ExtractionInterface {
56 EvpnChoice check(EvpnRegistry reg, ChoiceNode cont);
59 public static EvpnDestination extractEvpnDestination(final DataContainerNode<? extends PathArgument> evpnChoice) {
60 return extractDestination(evpnChoice, EvpnRegistry::serializeEvpnModel);
63 private static EvpnDestination extractDestination(final DataContainerNode<? extends PathArgument> evpnChoice, final ExtractionInterface extract) {
64 final EvpnRegistry reg = SimpleEvpnNlriRegistry.getInstance();
65 final ChoiceNode cont = (ChoiceNode) evpnChoice.getChild(EVPN_CHOICE_NID).get();
66 final EvpnChoice evpnValue = extract.check(reg, cont);
67 if (evpnValue == null) {
68 LOG.warn("Unrecognized Nlri {}", cont);
71 return new EvpnDestinationBuilder().setRouteDistinguisher(extractRouteDistinguisher(evpnChoice)).setEvpnChoice(evpnValue).build();
74 public static EvpnDestination extractRouteKeyDestination(final DataContainerNode<? extends PathArgument> evpnChoice) {
75 return extractDestination(evpnChoice, EvpnRegistry::serializeEvpnRouteKey);
79 public void parseNlri(final ByteBuf nlri, final MpUnreachNlriBuilder builder) throws BGPParsingException {
80 if (!nlri.isReadable()) {
83 final List<EvpnDestination> dst = parseNlri(nlri);
85 builder.setWithdrawnRoutes(new WithdrawnRoutesBuilder().setDestinationType(
86 new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.update.attributes.mp.unreach.nlri.withdrawn.
87 routes.destination.type.DestinationEvpnCaseBuilder().setDestinationEvpn(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.
88 yang.bgp.evpn.rev171207.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.destination.evpn._case.DestinationEvpnBuilder()
89 .setEvpnDestination(dst).build()).build()).build());
93 public void parseNlri(final ByteBuf nlri, final MpReachNlriBuilder builder) throws BGPParsingException {
94 if (!nlri.isReadable()) {
97 final List<EvpnDestination> dst = parseNlri(nlri);
99 builder.setAdvertizedRoutes(new AdvertizedRoutesBuilder().setDestinationType(
100 new DestinationEvpnCaseBuilder().setDestinationEvpn(new DestinationEvpnBuilder().setEvpnDestination(dst).build()).build()).build());
104 private static List<EvpnDestination> parseNlri(final ByteBuf nlri) {
105 if (!nlri.isReadable()) {
108 final List<EvpnDestination> dests = new ArrayList<>();
110 while (nlri.isReadable()) {
111 final EvpnDestinationBuilder builder = new EvpnDestinationBuilder();
112 final NlriType type = NlriType.forValue(nlri.readUnsignedByte());
113 final int length = nlri.readUnsignedByte();
114 final ByteBuf nlriBuf = nlri.readSlice(length);
115 builder.setRouteDistinguisher(parseRouteDistinguisher(nlriBuf));
116 builder.setEvpnChoice(SimpleEvpnNlriRegistry.getInstance().parseEvpn(type, nlriBuf));
117 dests.add(builder.build());
123 public void serializeAttribute(final DataObject attribute, final ByteBuf byteAggregator) {
124 Preconditions.checkArgument(attribute instanceof Attributes, "Attribute parameter is not a Attributes object");
125 final Attributes pathAttributes = (Attributes) attribute;
126 final Attributes1 pathAttributes1 = pathAttributes.getAugmentation(Attributes1.class);
127 final Attributes2 pathAttributes2 = pathAttributes.getAugmentation(Attributes2.class);
128 if (pathAttributes1 != null) {
129 final AdvertizedRoutes routes = pathAttributes1.getMpReachNlri().getAdvertizedRoutes();
130 if (routes != null && routes.getDestinationType() instanceof DestinationEvpnCase) {
131 final DestinationEvpnCase evpnCase = (DestinationEvpnCase) routes.getDestinationType();
132 serializeNlri(evpnCase.getDestinationEvpn().getEvpnDestination(), byteAggregator);
134 } else if (pathAttributes2 != null) {
135 final MpUnreachNlri mpUnreachNlri = pathAttributes2.getMpUnreachNlri();
136 final WithdrawnRoutes withdrawnRoutes = mpUnreachNlri.getWithdrawnRoutes();
137 if (withdrawnRoutes != null && withdrawnRoutes.getDestinationType() instanceof org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml
138 .ns.yang.bgp.evpn.rev171207.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationEvpnCase) {
139 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171207.update.attributes.mp.unreach.nlri.withdrawn.
140 routes.destination.type.DestinationEvpnCase evpnCase = (org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml
141 .ns.yang.bgp.evpn.rev171207.update.attributes.mp.unreach.nlri.withdrawn.routes.destination.type.DestinationEvpnCase) mpUnreachNlri.getWithdrawnRoutes().getDestinationType();
142 serializeNlri(evpnCase.getDestinationEvpn().getEvpnDestination(), byteAggregator);
147 public static void serializeNlri(final List<EvpnDestination> cEvpn, final ByteBuf output) {
148 ByteBuf nlriOutput = null;
149 for (final EvpnDestination dest : cEvpn) {
150 final ByteBuf nlriCommon = Unpooled.buffer();
151 serializeRouteDistinquisher(dest.getRouteDistinguisher(), nlriCommon);
152 nlriOutput = SimpleEvpnNlriRegistry.getInstance().serializeEvpn(dest.getEvpnChoice(), nlriCommon);
154 output.writeBytes(nlriOutput);