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 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
39 || buffer.readableBytes() == CONTENT_LENGTH2,
40 "Wrong length of array of bytes. Passed: %s ;", buffer);
42 final Esi esi = SimpleEsiTypeRegistry.getInstance().parseEsi(buffer.readSlice(ESI_SIZE));
43 final IpAddress ip = requireNonNull(parseOrigRouteIp(buffer));
45 final EsRouteBuilder builder = new EsRouteBuilder().setEsi(esi).setOrigRouteIp(ip);
46 return new EsRouteCaseBuilder().setEsRoute(builder.build()).build();
50 protected NlriType getType() {
51 return NlriType.EthSeg;
55 public ByteBuf serializeBody(final EvpnChoice evpnInput) {
56 Preconditions.checkArgument(evpnInput instanceof EsRouteCase,
57 "Unknown evpn instance. Passed %s. Needed EsRouteCase.", evpnInput.getClass());
58 final EsRoute evpn = ((EsRouteCase) evpnInput).getEsRoute();
59 final ByteBuf body = Unpooled.buffer();
60 SimpleEsiTypeRegistry.getInstance().serializeEsi(evpn.getEsi(), body);
61 final ByteBuf orig = serializeOrigRouteIp(evpn.getOrigRouteIp());
62 Preconditions.checkArgument(orig.readableBytes() > 0);
63 body.writeBytes(orig);
68 public EvpnChoice serializeEvpnModel(final ContainerNode evpnCase) {
69 return createRouteKey(evpnCase);
73 public EvpnChoice createRouteKey(final ContainerNode evpn) {
74 final EsRouteBuilder builder = new EsRouteBuilder();
75 builder.setEsi(serializeEsi(evpn));
76 builder.setOrigRouteIp(extractOrigRouteIp(evpn));
77 return new EsRouteCaseBuilder().setEsRoute(builder.build()).build();
80 static IpAddress parseOrigRouteIp(final ByteBuf buffer) {
81 final int ipLength = buffer.readUnsignedByte();
82 if (ipLength == Ipv6Util.IPV6_BITS_LENGTH) {
83 return new IpAddress(Ipv6Util.addressForByteBuf(buffer));
84 } else if (ipLength == Ipv4Util.IP4_BITS_LENGTH) {
85 return new IpAddress(Ipv4Util.addressForByteBuf(buffer));
90 static ByteBuf serializeOrigRouteIp(final IpAddress origRouteIp) {
91 final ByteBuf body = Unpooled.buffer();
92 if (origRouteIp.getIpv4Address() != null) {
93 body.writeByte(Ipv4Util.IP4_BITS_LENGTH);
94 body.writeBytes(Ipv4Util.bytesForAddress(origRouteIp.getIpv4Address()));
95 } else if (origRouteIp.getIpv6Address() != null) {
96 body.writeByte(Ipv6Util.IPV6_BITS_LENGTH);
97 body.writeBytes(Ipv6Util.bytesForAddress(origRouteIp.getIpv6Address()));
99 body.writeZero(ZERO_BYTE);