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 org.opendaylight.protocol.concepts.Ipv4Util;
13 import org.opendaylight.protocol.pcep.impl.object.EROSubobjectUtil;
14 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
15 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
16 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
17 import org.opendaylight.protocol.util.ByteArray;
18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.IpPrefixSubobject;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.IpPrefixCase;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.IpPrefixCaseBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.ip.prefix._case.IpPrefixBuilder;
26 import com.google.common.base.Preconditions;
27 import com.google.common.primitives.UnsignedBytes;
30 * Parser for {@link IpPrefixCase}
32 public class EROIpv4PrefixSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
34 public static final int TYPE = 1;
36 private static final int IP4_F_LENGTH = 4;
37 private static final int PREFIX4_F_LENGTH = 1;
39 private static final int PREFIX4_F_OFFSET = IP4_F_LENGTH;
41 private static final int CONTENT4_LENGTH = PREFIX4_F_OFFSET + PREFIX4_F_LENGTH + 1;
44 public Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException {
45 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
46 final SubobjectBuilder builder = new SubobjectBuilder();
47 builder.setLoose(loose);
48 if (buffer.readableBytes() != CONTENT4_LENGTH) {
49 throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + ";");
51 final int length = UnsignedBytes.toInt(buffer.getByte(PREFIX4_F_OFFSET));
52 IpPrefixBuilder prefix = new IpPrefixBuilder().setIpPrefix(new IpPrefix(Ipv4Util.prefixForBytes(ByteArray.readBytes(buffer, IP4_F_LENGTH), length)));
53 builder.setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(prefix.build()).build());
54 return builder.build();
58 public byte[] serializeSubobject(final Subobject subobject) {
59 if (!(subobject.getSubobjectType() instanceof IpPrefixCase)) {
60 throw new IllegalArgumentException("Unknown subobject instance. Passed " + subobject.getSubobjectType().getClass()
61 + ". Needed IpPrefixCase.");
63 final IpPrefixSubobject specObj = ((IpPrefixCase) subobject.getSubobjectType()).getIpPrefix();
64 final IpPrefix prefix = specObj.getIpPrefix();
66 if (prefix.getIpv4Prefix() == null && prefix.getIpv6Prefix() == null) {
67 throw new IllegalArgumentException("Unknown AbstractPrefix instance. Passed " + prefix.getClass() + ".");
69 if (prefix.getIpv6Prefix() != null) {
70 return new EROIpv6PrefixSubobjectParser().serializeSubobject(subobject);
72 final byte[] retBytes = new byte[CONTENT4_LENGTH];
73 ByteArray.copyWhole(Ipv4Util.bytesForPrefix(prefix.getIpv4Prefix()), retBytes, 0);
74 retBytes[PREFIX4_F_OFFSET] = UnsignedBytes.checkedCast(Ipv4Util.getPrefixLength(prefix));
75 return EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), retBytes);