pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/XROIpPrefixSubobjectParser.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.PCEPDeserializerException;
  12 import org.opendaylight.protocol.pcep.spi.XROSubobjectParser;
  13 import org.opendaylight.protocol.pcep.spi.XROSubobjectSerializer;
  14 import org.opendaylight.protocol.util.ByteArray;
  15 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.SubobjectsBuilder;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.ExcludeRouteSubobjects.Attribute;
  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.IpPrefixBuilder;
  21
  22 import com.google.common.primitives.UnsignedBytes;
  23
  24 /**
  25  * Parser for {@link IpPrefixSubobject}
  26  */
  27 public class XROIpPrefixSubobjectParser implements XROSubobjectParser, XROSubobjectSerializer {
  28
  29         public static final int TYPE = 1;
  30
  31         public static final int TYPE6 = 2;
  32
  33         public static final int IP4_F_LENGTH = 4;
  34         public static final int PREFIX_F_LENGTH = 1;
  35         public static final int ATTRIBUTE_LENGTH = 1;
  36
  37         public static final int IP_F_OFFSET = 0;
  38         public static final int PREFIX4_F_OFFSET = IP_F_OFFSET + IP4_F_LENGTH;
  39         public static final int ATTRIBUTE4_OFFSET = PREFIX4_F_OFFSET + PREFIX_F_LENGTH;
  40
  41         public static final int CONTENT4_LENGTH = ATTRIBUTE4_OFFSET + ATTRIBUTE_LENGTH;
  42
  43         public static final int IP6_F_LENGTH = 16;
  44         public static final int PREFIX6_F_OFFSET = IP_F_OFFSET + IP6_F_LENGTH;
  45         public static final int ATTRIBUTE6_OFFSET = PREFIX6_F_OFFSET + PREFIX_F_LENGTH;
  46
  47         public static final int CONTENT6_LENGTH = ATTRIBUTE6_OFFSET + ATTRIBUTE_LENGTH;
  48
  49         @Override
  50         public Subobjects parseSubobject(final byte[] buffer, final boolean mandatory) throws PCEPDeserializerException {
  51                 if (buffer == null || buffer.length == 0)
  52                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  53                 if (buffer.length != CONTENT4_LENGTH && buffer.length != CONTENT6_LENGTH)
  54                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + ";");
  55
  56                 final int length = UnsignedBytes.toInt(buffer[PREFIX4_F_OFFSET]);
  57
  58                 final SubobjectsBuilder builder = new SubobjectsBuilder();
  59                 builder.setMandatory(mandatory);
  60                 builder.setAttribute(Attribute.forValue(buffer[ATTRIBUTE4_OFFSET] & 0xFF));
  61                 builder.setSubobjectType(new IpPrefixBuilder().setIpPrefix(
  62                                 new IpPrefix(Ipv4Util.prefixForBytes(ByteArray.subByte(buffer, IP_F_OFFSET, IP4_F_LENGTH), length))).build());
  63                 return builder.build();
  64         }
  65
  66         @Override
  67         public byte[] serializeSubobject(final Subobjects subobject) {
  68                 if (!(subobject.getSubobjectType() instanceof IpPrefixSubobject))
  69                         throw new IllegalArgumentException("Unknown PCEPXROSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  70                                         + ". Needed IpPrefixSubobject.");
  71
  72                 final IpPrefixSubobject specObj = (IpPrefixSubobject) subobject.getSubobjectType();
  73                 final IpPrefix prefix = specObj.getIpPrefix();
  74
  75                 if (prefix.getIpv4Prefix() == null && prefix.getIpv6Prefix() == null)
  76                         throw new IllegalArgumentException("Unknown AbstractPrefix instance. Passed " + prefix.getClass() + ".");
  77
  78                 if (prefix.getIpv4Prefix() != null) {
  79                         final byte[] retBytes = new byte[CONTENT4_LENGTH];
  80                         ByteArray.copyWhole(prefix.getIpv4Prefix().getValue().getBytes(), retBytes, IP_F_OFFSET);
  81                         retBytes[PREFIX4_F_OFFSET] = ByteArray.intToBytes(Ipv4Util.getPrefixLength(prefix))[Integer.SIZE / Byte.SIZE - 1];
  82                         return retBytes;
  83                 } else {
  84                         final byte[] retBytes = new byte[CONTENT6_LENGTH];
  85                         ByteArray.copyWhole(prefix.getIpv6Prefix().getValue().getBytes(), retBytes, IP_F_OFFSET);
  86                         retBytes[PREFIX6_F_OFFSET] = ByteArray.intToBytes(Ipv4Util.getPrefixLength(prefix))[Integer.SIZE / Byte.SIZE - 1];
  87                         return retBytes;
  88                 }
  89         }
  90
  91         @Override
  92         public int getType() {
  93                 return TYPE;
  94         }
  95
  96         public int getType6() {
  97                 return TYPE6;
  98         }
  99 }