pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/EROIpv4PrefixSubobjectParser.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.protocol.pcep.impl.subobject;
   9
  10 import org.opendaylight.protocol.concepts.Ipv4Util;
  11 import org.opendaylight.protocol.pcep.impl.object.EROSubobjectUtil;
  12 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
  13 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
  14 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  15 import org.opendaylight.protocol.util.ByteArray;
  16 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.IpPrefixSubobject;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.IpPrefixCase;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.IpPrefixCaseBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.ip.prefix._case.IpPrefixBuilder;
  23
  24 import com.google.common.primitives.UnsignedBytes;
  25
  26 /**
  27  * Parser for {@link IpPrefixCase}
  28  */
  29 public class EROIpv4PrefixSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
  30
  31         public static final int TYPE = 1;
  32
  33         private static final int IP4_F_LENGTH = 4;
  34         private static final int PREFIX4_F_LENGTH = 1;
  35
  36         private static final int PREFIX4_F_OFFSET = IP4_F_LENGTH;
  37
  38         private static final int CONTENT4_LENGTH = PREFIX4_F_OFFSET + PREFIX4_F_LENGTH + 1;
  39
  40         @Override
  41         public Subobject parseSubobject(final byte[] buffer, final boolean loose) throws PCEPDeserializerException {
  42                 if (buffer == null || buffer.length == 0) {
  43                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  44                 }
  45                 final SubobjectBuilder builder = new SubobjectBuilder();
  46                 builder.setLoose(loose);
  47
  48                 if (buffer.length != CONTENT4_LENGTH) {
  49                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + ";");
  50                 }
  51                 final int length = UnsignedBytes.toInt(buffer[PREFIX4_F_OFFSET]);
  52                 builder.setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(
  53                                 new IpPrefixBuilder().setIpPrefix(new IpPrefix(Ipv4Util.prefixForBytes(ByteArray.subByte(buffer, 0, IP4_F_LENGTH), length))).build()).build());
  54                 return builder.build();
  55         }
  56
  57         @Override
  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.");
  62                 }
  63                 final IpPrefixSubobject specObj = ((IpPrefixCase) subobject.getSubobjectType()).getIpPrefix();
  64                 final IpPrefix prefix = specObj.getIpPrefix();
  65
  66                 if (prefix.getIpv4Prefix() == null && prefix.getIpv6Prefix() == null) {
  67                         throw new IllegalArgumentException("Unknown AbstractPrefix instance. Passed " + prefix.getClass() + ".");
  68                 }
  69                 if (prefix.getIpv6Prefix() != null) {
  70                         return new EROIpv6PrefixSubobjectParser().serializeSubobject(subobject);
  71                 }
  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);
  76         }
  77 }