pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/XROIpv6PrefixSubobjectParser.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.concepts.Ipv6Util;
  12 import org.opendaylight.protocol.pcep.impl.object.XROSubobjectUtil;
  13 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  14 import org.opendaylight.protocol.pcep.spi.XROSubobjectParser;
  15 import org.opendaylight.protocol.pcep.spi.XROSubobjectSerializer;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.SubobjectBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.ExcludeRouteSubobjects.Attribute;
  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;
  25
  26 import com.google.common.primitives.UnsignedBytes;
  27
  28 /**
  29  * Parser for {@link IpPrefixCase}
  30  */
  31 public class XROIpv6PrefixSubobjectParser implements XROSubobjectParser, XROSubobjectSerializer {
  32
  33         public static final int TYPE = 2;
  34
  35         private static final int PREFIX_F_LENGTH = 1;
  36         private static final int ATTRIBUTE_LENGTH = 1;
  37
  38         private static final int IP_F_OFFSET = 0;
  39
  40         private static final int IP6_F_LENGTH = 16;
  41         private static final int PREFIX6_F_OFFSET = IP_F_OFFSET + IP6_F_LENGTH;
  42         private static final int ATTRIBUTE6_OFFSET = PREFIX6_F_OFFSET + PREFIX_F_LENGTH;
  43
  44         private static final int CONTENT6_LENGTH = ATTRIBUTE6_OFFSET + ATTRIBUTE_LENGTH;
  45
  46         @Override
  47         public Subobject parseSubobject(final byte[] buffer, final boolean mandatory) throws PCEPDeserializerException {
  48                 if (buffer == null || buffer.length == 0) {
  49                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  50                 }
  51                 if (buffer.length != CONTENT6_LENGTH) {
  52                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + ";");
  53                 }
  54                 final SubobjectBuilder builder = new SubobjectBuilder();
  55                 builder.setMandatory(mandatory);
  56                 final int length = UnsignedBytes.toInt(buffer[PREFIX6_F_OFFSET]);
  57                 builder.setAttribute(Attribute.forValue(UnsignedBytes.toInt(buffer[ATTRIBUTE6_OFFSET])));
  58                 builder.setSubobjectType(new IpPrefixCaseBuilder().setIpPrefix(
  59                                 new IpPrefixBuilder().setIpPrefix(
  60                                                 new IpPrefix(Ipv6Util.prefixForBytes(ByteArray.subByte(buffer, IP_F_OFFSET, IP6_F_LENGTH), length))).build()).build());
  61                 return builder.build();
  62         }
  63
  64         @Override
  65         public byte[] serializeSubobject(final Subobject subobject) {
  66                 if (!(subobject.getSubobjectType() instanceof IpPrefixCase)) {
  67                         throw new IllegalArgumentException("Unknown PCEPXROSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  68                                         + ". Needed IpPrefixCase.");
  69                 }
  70                 final IpPrefixSubobject specObj = ((IpPrefixCase) subobject.getSubobjectType()).getIpPrefix();
  71                 final IpPrefix prefix = specObj.getIpPrefix();
  72
  73                 if (prefix.getIpv6Prefix() == null) {
  74                         throw new IllegalArgumentException("Unknown AbstractPrefix instance. Passed " + prefix.getClass() + ".");
  75                 }
  76                 final byte[] retBytes = new byte[CONTENT6_LENGTH];
  77                 ByteArray.copyWhole(Ipv6Util.bytesForPrefix(prefix.getIpv6Prefix()), retBytes, IP_F_OFFSET);
  78                 retBytes[PREFIX6_F_OFFSET] = UnsignedBytes.checkedCast(Ipv4Util.getPrefixLength(prefix));
  79                 retBytes[ATTRIBUTE6_OFFSET] = UnsignedBytes.checkedCast(subobject.getAttribute().getIntValue());
  80                 return XROSubobjectUtil.formatSubobject(TYPE, subobject.isMandatory(), retBytes);
  81         }
  82
  83         @Override
  84         public int getType() {
  85                 return TYPE;
  86         }
  87 }