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.impl.subobject;
10 import io.netty.buffer.ByteBuf;
12 import java.util.BitSet;
14 import org.opendaylight.protocol.concepts.Ipv4Util;
15 import org.opendaylight.protocol.concepts.Ipv6Util;
16 import org.opendaylight.protocol.pcep.impl.object.RROSubobjectUtil;
17 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
18 import org.opendaylight.protocol.pcep.spi.RROSubobjectParser;
19 import org.opendaylight.protocol.pcep.spi.RROSubobjectSerializer;
20 import org.opendaylight.protocol.util.ByteArray;
21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.rro.Subobject;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.rro.SubobjectBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.IpPrefixSubobject;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.IpPrefixCase;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.IpPrefixCaseBuilder;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.ip.prefix._case.IpPrefixBuilder;
29 import com.google.common.base.Preconditions;
30 import com.google.common.primitives.UnsignedBytes;
33 * Parser for {@link IpPrefixCase}
35 public class RROIpv6PrefixSubobjectParser implements RROSubobjectParser, RROSubobjectSerializer {
37 public static final int TYPE = 2;
39 private static final int IP_F_LENGTH = 16;
41 private static final int PREFIX_F_LENGTH = 1;
42 private static final int FLAGS_F_LENGTH = 1;
44 private static final int IP_F_OFFSET = 0;
46 private static final int PREFIX_F_OFFSET = IP_F_OFFSET + IP_F_LENGTH;
47 private static final int FLAGS_F_OFFSET = PREFIX_F_OFFSET + PREFIX_F_LENGTH;
49 private static final int CONTENT_LENGTH = IP_F_LENGTH + PREFIX_F_LENGTH + FLAGS_F_LENGTH;
51 private static final int LPA_F_OFFSET = 7;
52 private static final int LPIU_F_OFFSET = 6;
55 public Subobject parseSubobject(final ByteBuf buffer) throws PCEPDeserializerException {
56 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
57 final SubobjectBuilder builder = new SubobjectBuilder();
58 if (buffer.readableBytes() != CONTENT_LENGTH) {
59 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + ";");
61 final int length = UnsignedBytes.toInt(buffer.getByte(PREFIX_F_OFFSET));
62 IpPrefixBuilder prefix = new IpPrefixBuilder().setIpPrefix(new IpPrefix(Ipv6Util.prefixForBytes(ByteArray.readBytes(buffer, IP_F_LENGTH), length)));
63 buffer.readerIndex(buffer.readerIndex() + PREFIX_F_LENGTH);
64 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.readBytes(buffer, FLAGS_F_LENGTH));
65 builder.setProtectionAvailable(flags.get(LPA_F_OFFSET));
66 builder.setProtectionInUse(flags.get(LPIU_F_OFFSET));
67 builder.setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(prefix.build()).build());
68 return builder.build();
72 public byte[] serializeSubobject(final Subobject subobject) {
73 if (!(subobject.getSubobjectType() instanceof IpPrefixCase)) {
74 throw new IllegalArgumentException("Unknown ReportedRouteSubobject instance. Passed " + subobject.getClass()
75 + ". Needed IpPrefixCase.");
77 final IpPrefixSubobject specObj = ((IpPrefixCase) subobject.getSubobjectType()).getIpPrefix();
78 final IpPrefix prefix = specObj.getIpPrefix();
79 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
80 flags.set(LPA_F_OFFSET, subobject.isProtectionAvailable());
81 flags.set(LPIU_F_OFFSET, subobject.isProtectionInUse());
82 final byte[] retBytes = new byte[CONTENT_LENGTH];
83 ByteArray.copyWhole(Ipv6Util.bytesForPrefix(prefix.getIpv6Prefix()), retBytes, IP_F_OFFSET);
84 retBytes[PREFIX_F_OFFSET] = UnsignedBytes.checkedCast(Ipv4Util.getPrefixLength(prefix));
85 ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
86 return RROSubobjectUtil.formatSubobject(TYPE, retBytes);