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 org.opendaylight.protocol.util.ByteBufWriteUtil.writeIpv4Prefix;
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.spi.PCEPDeserializerException;
16 import org.opendaylight.protocol.pcep.spi.RROSubobjectParser;
17 import org.opendaylight.protocol.pcep.spi.RROSubobjectSerializer;
18 import org.opendaylight.protocol.pcep.spi.RROSubobjectUtil;
19 import org.opendaylight.protocol.util.BitArray;
20 import org.opendaylight.protocol.util.ByteArray;
21 import org.opendaylight.protocol.util.Ipv4Util;
22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.reported.route.object.rro.Subobject;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.reported.route.object.rro.SubobjectBuilder;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.IpPrefixSubobject;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.subobject.type.IpPrefixCase;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.subobject.type.IpPrefixCaseBuilder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects.subobject.type.ip.prefix._case.IpPrefixBuilder;
31 * Parser for {@link IpPrefixCase}.
33 public class RROIpv4PrefixSubobjectParser implements RROSubobjectParser, RROSubobjectSerializer {
35 public static final int TYPE = 1;
37 private static final int PREFIX_F_LENGTH = 1;
38 private static final int FLAGS_SIZE = 8;
40 private static final int PREFIX4_F_OFFSET = Ipv4Util.IP4_LENGTH;
42 private static final int CONTENT4_LENGTH = Ipv4Util.IP4_LENGTH + PREFIX_F_LENGTH + FLAGS_SIZE / Byte.SIZE;
44 private static final int LPA_F_OFFSET = 7;
45 private static final int LPIU_F_OFFSET = 6;
48 public Subobject parseSubobject(final ByteBuf buffer) throws PCEPDeserializerException {
49 Preconditions.checkArgument(buffer != null && buffer.isReadable(),
50 "Array of bytes is mandatory. Can't be null or empty.");
51 if (buffer.readableBytes() != CONTENT4_LENGTH) {
52 throw new PCEPDeserializerException(
53 "Wrong length of array of bytes. Passed: " + buffer.readableBytes() + ";");
55 final int length = buffer.getUnsignedByte(PREFIX4_F_OFFSET);
56 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.record.route.subobjects
57 .subobject.type.ip.prefix._case.IpPrefix prefix = new IpPrefixBuilder().setIpPrefix(
58 new IpPrefix(Ipv4Util.prefixForBytes(ByteArray.readBytes(buffer, Ipv4Util.IP4_LENGTH), length)))
60 buffer.skipBytes(PREFIX_F_LENGTH);
61 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
62 final SubobjectBuilder builder = new SubobjectBuilder()
63 .setProtectionAvailable(flags.get(LPA_F_OFFSET))
64 .setProtectionInUse(flags.get(LPIU_F_OFFSET))
65 .setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(prefix).build());
66 return builder.build();
70 public void serializeSubobject(final Subobject subobject, final ByteBuf buffer) {
71 Preconditions.checkArgument(subobject.getSubobjectType() instanceof IpPrefixCase,
72 "Unknown subobject instance. Passed %s. Needed IpPrefixCase.", subobject.getSubobjectType().getClass());
73 final IpPrefixSubobject specObj = ((IpPrefixCase) subobject.getSubobjectType()).getIpPrefix();
74 final IpPrefix prefix = specObj.getIpPrefix();
75 Preconditions.checkArgument(prefix.getIpv4Prefix() != null || prefix.getIpv6Prefix() != null,
76 "Unknown AbstractPrefix instance. Passed %s.", prefix.getClass());
77 if (prefix.getIpv6Prefix() != null) {
78 new RROIpv6PrefixSubobjectParser().serializeSubobject(subobject, buffer);
80 final BitArray flags = new BitArray(FLAGS_SIZE);
81 flags.set(LPA_F_OFFSET, subobject.isProtectionAvailable());
82 flags.set(LPIU_F_OFFSET, subobject.isProtectionInUse());
83 final ByteBuf body = Unpooled.buffer(CONTENT4_LENGTH);
84 Preconditions.checkArgument(prefix.getIpv4Prefix() != null, "Ipv4Prefix is mandatory.");
85 writeIpv4Prefix(prefix.getIpv4Prefix(), body);
86 flags.toByteBuf(body);
87 RROSubobjectUtil.formatSubobject(TYPE, body, buffer);