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.rsvp.parser.impl.subobject.ero;
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.rsvp.parser.spi.EROSubobjectParser;
16 import org.opendaylight.protocol.rsvp.parser.spi.EROSubobjectSerializer;
17 import org.opendaylight.protocol.rsvp.parser.spi.EROSubobjectUtil;
18 import org.opendaylight.protocol.rsvp.parser.spi.LabelRegistry;
19 import org.opendaylight.protocol.rsvp.parser.spi.RSVPParsingException;
20 import org.opendaylight.protocol.util.BitArray;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.LabelCase;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.LabelCaseBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.label._case.Label;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.label._case.LabelBuilder;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.list.SubobjectContainer;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.list.SubobjectContainerBuilder;
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 this.registry = requireNonNull(labelReg);
53 public SubobjectContainer parseSubobject(final ByteBuf buffer, final boolean loose) throws RSVPParsingException {
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 RSVPParsingException("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 = this.registry.parseLabel(cType, buffer.slice());
64 if (labelType == null) {
65 LOG.warn("Ignoring ERO label subobject with unknown C-TYPE: {}", cType);
68 final LabelBuilder builder = new LabelBuilder();
69 builder.setUniDirectional(reserved.get(U_FLAG_OFFSET));
70 builder.setLabelType(labelType);
71 return new SubobjectContainerBuilder().setLoose(loose).setSubobjectType(
72 new LabelCaseBuilder().setLabel(builder.build()).build()).build();
76 public void serializeSubobject(final SubobjectContainer subobject, final ByteBuf buffer) {
77 Preconditions.checkArgument(subobject.getSubobjectType() instanceof LabelCase,
78 "Unknown subobject instance. Passed %s. Needed LabelCase.",
79 subobject.getSubobjectType().getClass());
80 final Label label = ((LabelCase) subobject.getSubobjectType()).getLabel();
81 final ByteBuf body = Unpooled.buffer();
82 this.registry.serializeLabel(label.isUniDirectional(), false, label.getLabelType(), body);
83 EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), body, buffer);