2 * Copyright (c) 2015 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.linkstate.impl.attribute.sr;
10 import static org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.binding.sid.sub.tlvs.SIDParser.SID_TYPE;
12 import com.google.common.collect.ImmutableMap;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.Unpooled;
16 import org.opendaylight.protocol.util.BitArray;
17 import org.opendaylight.protocol.util.Ipv6Util;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.SidLabelIndex;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.sid.label.index.Ipv6AddressCase;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.sid.label.index.Ipv6AddressCaseBuilder;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.sid.label.index.LocalLabelCase;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.sid.label.index.LocalLabelCaseBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.sid.label.index.SidCase;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.sid.label.index.sid.label.index.SidCaseBuilder;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.MplsLabel;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
29 public final class SidLabelIndexParser {
31 private static final Logger LOG = LoggerFactory.getLogger(SidLabelIndexParser.class);
32 private static final int LABEL_MASK = 0xfffff;
34 private SidLabelIndexParser() {
35 throw new UnsupportedOperationException();
39 LABEL(3), SID(4), IPV6_ADD(16);
40 private static final Map<Integer, Size> VALUE_MAP;
43 final ImmutableMap.Builder<java.lang.Integer, Size> b = ImmutableMap.builder();
44 for (final Size enumItem : Size.values()) {
45 b.put(enumItem.length, enumItem);
47 VALUE_MAP = b.build();
50 private final int length;
52 Size(final int length) {
56 public static Size forValue(final int value) {
57 return VALUE_MAP.get(value);
61 public static ByteBuf serializeSidValue(final SidLabelIndex tlv) {
62 if (tlv instanceof Ipv6AddressCase) {
63 return Ipv6Util.byteBufForAddress(((Ipv6AddressCase) tlv).getIpv6Address());
64 } else if (tlv instanceof LocalLabelCase) {
65 return Unpooled.copyMedium(((LocalLabelCase) tlv).getLocalLabel().getValue().intValue() & LABEL_MASK);
66 } else if (tlv instanceof SidCase) {
67 return Unpooled.copyInt(((SidCase) tlv).getSid().intValue());
72 static SidLabelIndex parseSidSubTlv(final ByteBuf buffer) {
73 final int type = buffer.readUnsignedShort();
74 if (type != SID_TYPE) {
75 LOG.warn("Unexpected type in SID/index/label field, expected {}, actual {}, ignoring it", SID_TYPE, type);
78 final int length = buffer.readUnsignedShort();
79 return parseSidLabelIndex(Size.forValue(length), buffer);
82 public static SidLabelIndex parseSidLabelIndex(final Size length, final ByteBuf buffer) {
85 return new LocalLabelCaseBuilder()
86 .setLocalLabel(new MplsLabel(Long.valueOf(buffer.readUnsignedMedium() & LABEL_MASK))).build();
88 return new SidCaseBuilder().setSid(buffer.readUnsignedInt()).build();
90 return new Ipv6AddressCaseBuilder().setIpv6Address(Ipv6Util.addressForByteBuf(buffer)).build();
96 static void setFlags(final SidLabelIndex tlv, final BitArray flags, final int value, final int local) {
97 if (tlv instanceof LocalLabelCase) {
98 flags.set(value, Boolean.TRUE);
99 flags.set(local, Boolean.TRUE);
100 } else if (tlv instanceof SidCase) {
101 flags.set(value, Boolean.FALSE);
102 flags.set(local, Boolean.FALSE);
103 } else if (tlv instanceof Ipv6AddressCase) {
104 flags.set(value, Boolean.TRUE);
105 flags.set(local, Boolean.FALSE);