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
9 package org.opendaylight.protocol.bgp.evpn.impl.nlri;
11 import static java.util.Objects.requireNonNull;
12 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.extractOrigRouteIp;
14 import com.google.common.base.Preconditions;
15 import io.netty.buffer.ByteBuf;
16 import io.netty.buffer.Unpooled;
17 import org.opendaylight.protocol.bgp.evpn.spi.pojo.SimpleEsiTypeRegistry;
18 import org.opendaylight.protocol.util.Ipv4Util;
19 import org.opendaylight.protocol.util.Ipv6Util;
20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.NlriType;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.es.route.EsRoute;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.es.route.EsRouteBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.esi.Esi;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.EvpnChoice;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.evpn.choice.EsRouteCase;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev171213.evpn.evpn.choice.EsRouteCaseBuilder;
28 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
29 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
31 final class EthSegRParser extends AbstractEvpnNlri {
32 protected static final NodeIdentifier ES_ROUTE_NID = new NodeIdentifier(EsRoute.QNAME);
33 private static final int CONTENT_LENGTH = 15;
34 private static final int CONTENT_LENGTH2 = 27;
37 public EvpnChoice parseEvpn(final ByteBuf buffer) {
38 Preconditions.checkArgument(buffer.readableBytes() == CONTENT_LENGTH || buffer.readableBytes() == CONTENT_LENGTH2,
39 "Wrong length of array of bytes. Passed: %s ;", buffer);
41 final Esi esi = SimpleEsiTypeRegistry.getInstance().parseEsi(buffer.readSlice(ESI_SIZE));
42 final IpAddress ip = requireNonNull(parseOrigRouteIp(buffer));
44 final EsRouteBuilder builder = new EsRouteBuilder().setEsi(esi).setOrigRouteIp(ip);
45 return new EsRouteCaseBuilder().setEsRoute(builder.build()).build();
49 protected NlriType getType() {
50 return NlriType.EthSeg;
54 public ByteBuf serializeBody(final EvpnChoice evpnInput) {
55 Preconditions.checkArgument(evpnInput instanceof EsRouteCase, "Unknown evpn instance. Passed %s. Needed EsRouteCase.",
56 evpnInput.getClass());
57 return serializeBody(((EsRouteCase) evpnInput).getEsRoute());
61 public EvpnChoice serializeEvpnModel(final ContainerNode evpnCase) {
62 return createRouteKey(evpnCase);
66 public EvpnChoice createRouteKey(final ContainerNode evpn) {
67 final EsRouteBuilder builder = new EsRouteBuilder();
68 builder.setEsi(serializeEsi(evpn));
69 builder.setOrigRouteIp(extractOrigRouteIp(evpn));
70 return new EsRouteCaseBuilder().setEsRoute(builder.build()).build();
73 private static ByteBuf serializeBody(final EsRoute evpn) {
74 final ByteBuf body = Unpooled.buffer();
75 SimpleEsiTypeRegistry.getInstance().serializeEsi(evpn.getEsi(), body);
76 final ByteBuf orig = serializeOrigRouteIp(evpn.getOrigRouteIp());
77 Preconditions.checkArgument(orig.readableBytes() > 0);
78 body.writeBytes(orig);
82 public static IpAddress parseOrigRouteIp(final ByteBuf buffer) {
83 final int ipLength = buffer.readUnsignedByte();
84 if (ipLength == Ipv6Util.IPV6_BITS_LENGTH) {
85 return new IpAddress(Ipv6Util.addressForByteBuf(buffer));
86 } else if (ipLength == Ipv4Util.IP4_BITS_LENGTH) {
87 return new IpAddress(Ipv4Util.addressForByteBuf(buffer));
92 static ByteBuf serializeOrigRouteIp(final IpAddress origRouteIp) {
93 final ByteBuf body = Unpooled.buffer();
94 if (origRouteIp.getIpv4Address() != null) {
95 body.writeByte(Ipv4Util.IP4_BITS_LENGTH);
96 body.writeBytes(Ipv4Util.bytesForAddress(origRouteIp.getIpv4Address()));
97 } else if (origRouteIp.getIpv6Address() != null) {
98 body.writeByte(Ipv6Util.IPV6_BITS_LENGTH);
99 body.writeBytes(Ipv6Util.bytesForAddress(origRouteIp.getIpv6Address()));
101 body.writeZero(ZERO_BYTE);