2 * Copyright (c) 2013 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.pcep.parser.subobject;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.Preconditions;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.Unpooled;
15 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
16 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
17 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
18 import org.opendaylight.protocol.pcep.spi.EROSubobjectUtil;
19 import org.opendaylight.protocol.pcep.spi.LabelRegistry;
20 import org.opendaylight.protocol.util.BitArray;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.explicit.route.object.ero.Subobject;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.explicit.route.object.ero.SubobjectBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.LabelCase;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.LabelCaseBuilder;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.label._case.Label;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.label._case.LabelBuilder;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.label.subobject.LabelType;
28 import org.slf4j.Logger;
29 import org.slf4j.LoggerFactory;
31 public class EROLabelSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
32 private static final Logger LOG = LoggerFactory.getLogger(EROLabelSubobjectParser.class);
34 public static final int TYPE = 3;
36 private static final int FLAGS_SIZE = 8;
38 private static final int C_TYPE_F_LENGTH = 1;
40 private static final int C_TYPE_F_OFFSET = FLAGS_SIZE / Byte.SIZE;
42 private static final int HEADER_LENGTH = C_TYPE_F_OFFSET + C_TYPE_F_LENGTH;
44 private static final int U_FLAG_OFFSET = 0;
46 private final LabelRegistry registry;
48 public EROLabelSubobjectParser(final LabelRegistry labelReg) {
49 registry = requireNonNull(labelReg);
53 public Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException {
54 Preconditions.checkArgument(buffer != null && buffer.isReadable(),
55 "Array of bytes is mandatory. Can't be null or empty.");
56 if (buffer.readableBytes() < HEADER_LENGTH) {
57 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes()
58 + "; Expected: >" + HEADER_LENGTH + ".");
60 final BitArray reserved = BitArray.valueOf(buffer, FLAGS_SIZE);
61 final short cType = buffer.readUnsignedByte();
63 final LabelType labelType = registry.parseLabel(cType, buffer.slice());
64 if (labelType == null) {
65 LOG.warn("Ignoring ERO label subobject with unknown C-TYPE: {}", cType);
68 final LabelBuilder lbuilder = new LabelBuilder()
69 .setUniDirectional(reserved.get(U_FLAG_OFFSET))
70 .setLabelType(labelType);
71 final SubobjectBuilder builder = new SubobjectBuilder()
73 .setSubobjectType(new LabelCaseBuilder().setLabel(lbuilder.build()).build());
75 return builder.build();
79 public void serializeSubobject(final Subobject subobject, final ByteBuf buffer) {
80 Preconditions.checkArgument(subobject.getSubobjectType() instanceof LabelCase,
81 "Unknown subobject instance. Passed %s. Needed LabelCase.", subobject.getSubobjectType().getClass());
82 final Label label = ((LabelCase) subobject.getSubobjectType()).getLabel();
83 final ByteBuf body = Unpooled.buffer();
84 registry.serializeLabel(label.getUniDirectional(), false, label.getLabelType(), body);
85 EROSubobjectUtil.formatSubobject(TYPE, subobject.getLoose(), body, buffer);