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.attribute.sr;
10 import io.netty.buffer.ByteBuf;
11 import io.netty.buffer.Unpooled;
12 import java.util.ArrayList;
13 import java.util.List;
14 import org.opendaylight.protocol.bgp.linkstate.attribute.PrefixAttributesParser;
15 import org.opendaylight.protocol.bgp.linkstate.attribute.sr.SidLabelIndexParser.Size;
16 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
17 import org.opendaylight.protocol.util.BitArray;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.prefix.state.SrRange;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.prefix.state.SrRangeBuilder;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.sub.tlvs.RangeSubTlv;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.sub.tlvs.range.sub.tlv.BindingSidTlvCase;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.sub.tlvs.range.sub.tlv.BindingSidTlvCaseBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.sub.tlvs.range.sub.tlv.PrefixSidTlvCase;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.sub.tlvs.range.sub.tlv.PrefixSidTlvCaseBuilder;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.sub.tlvs.range.sub.tlv.SidLabelTlvCase;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.sub.tlvs.range.sub.tlv.SidLabelTlvCaseBuilder;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.tlv.SubTlvs;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.segment.routing.ext.rev151014.range.tlv.SubTlvsBuilder;
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
32 public final class RangeTlvParser {
34 private static final Logger LOG = LoggerFactory.getLogger(RangeTlvParser.class);
36 private RangeTlvParser() {
37 throw new UnsupportedOperationException();
41 private static final int FLAGS_SIZE = 8;
42 private static final int INNER_AREA = 0;
44 private static final int RESERVED = 1;
46 public static SrRange parseSrRange(final ByteBuf buffer) {
47 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
48 final SrRangeBuilder range = new SrRangeBuilder();
49 range.setInterArea(flags.get(INNER_AREA));
50 buffer.skipBytes(RESERVED);
51 range.setRangeSize(buffer.readUnsignedShort());
52 range.setSubTlvs(parseRangeSubTlvs(buffer));
56 private static List<SubTlvs> parseRangeSubTlvs(final ByteBuf buffer) {
57 final List<SubTlvs> subTlvs = new ArrayList<>();
58 while (buffer.isReadable()) {
59 final SubTlvsBuilder subTlv = new SubTlvsBuilder();
60 RangeSubTlv subTlvCase = null;
61 final int type = buffer.readUnsignedShort();
62 final int length = buffer.readUnsignedShort();
64 case PrefixAttributesParser.PREFIX_SID:
65 subTlvCase = new PrefixSidTlvCaseBuilder(SrPrefixAttributesParser.parseSrPrefix(buffer.readSlice(length))).build();
67 case PrefixAttributesParser.BINDING_SID:
68 subTlvCase = new BindingSidTlvCaseBuilder(BindingSidLabelParser.parseBindingSidLabel(buffer.readSlice(length))).build();
70 case SidLabelIndexParser.SID_TYPE:
71 subTlvCase = new SidLabelTlvCaseBuilder().setSidLabelIndex(SidLabelIndexParser.parseSidLabelIndex(Size.forValue(length), buffer.readSlice(length))).build();
74 LOG.info("Unknown type of range sub-tlv: {}", type);
75 buffer.skipBytes(length);
78 subTlvs.add(subTlv.setRangeSubTlv(subTlvCase).build());
83 public static void serializeSrRange(final SrRange srRange, final ByteBuf aggregator) {
84 final BitArray flags = new BitArray(FLAGS_SIZE);
85 flags.set(INNER_AREA, srRange.isInterArea());
86 flags.toByteBuf(aggregator);
87 aggregator.writeZero(RESERVED);
88 aggregator.writeShort(srRange.getRangeSize());
89 serializeSubTlvs(aggregator, srRange.getSubTlvs());
92 private static void serializeSubTlvs(final ByteBuf aggregator, final List<SubTlvs> subTlvs) {
93 for (final SubTlvs subTlv : subTlvs) {
94 ByteBuf buffer = Unpooled.buffer();
95 final RangeSubTlv rangeSubTlv = subTlv.getRangeSubTlv();
96 if (rangeSubTlv instanceof PrefixSidTlvCase) {
97 final PrefixSidTlvCase prefixSidTlv = (PrefixSidTlvCase) rangeSubTlv;
98 SrPrefixAttributesParser.serializePrefixAttributes(
99 prefixSidTlv.getFlags(),
100 prefixSidTlv.getAlgorithm(),
101 prefixSidTlv.getSidLabelIndex(),
103 TlvUtil.writeTLV(PrefixAttributesParser.PREFIX_SID, buffer, aggregator);
104 } else if (rangeSubTlv instanceof BindingSidTlvCase) {
105 final BindingSidTlvCase rangeTlv = (BindingSidTlvCase) rangeSubTlv;
106 BindingSidLabelParser.serializeBindingSidAttributes(
107 rangeTlv.getWeight(),
109 rangeTlv.getBindingSubTlvs(),
111 TlvUtil.writeTLV(PrefixAttributesParser.BINDING_SID, buffer, aggregator);
112 } else if (rangeSubTlv instanceof SidLabelTlvCase) {
113 buffer = SidLabelIndexParser.serializeSidValue(((SidLabelTlvCase) rangeSubTlv).getSidLabelIndex());
114 TlvUtil.writeTLV(SidLabelIndexParser.SID_TYPE, buffer, aggregator);