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.Ipv6Util;
  11 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  12 import org.opendaylight.protocol.pcep.subobject.ExcludeRouteSubobject;
  13 import org.opendaylight.protocol.pcep.subobject.XROIPPrefixSubobject;
  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
  17 import com.google.common.primitives.UnsignedBytes;
  18
  19 /**
  20  * Parser for {@link org.opendaylight.protocol.pcep.subobject.XROIPPrefixSubobject XROIPPrefixSubobject<IPv6Prefix>}
  21  */
  22 public class XROIPv6PrefixSubobjectParser {
  23         public static final int IP_F_LENGTH = 16;
  24         public static final int PREFIX_F_LENGTH = 1;
  25         public static final int ATTRIBUTE_LENGTH = 1;
  26
  27         public static final int IP_F_OFFSET = 0;
  28         public static final int PREFIX_F_OFFSET = IP_F_OFFSET + IP_F_LENGTH;
  29         public static final int ATTRIBUTE_OFFSET = PREFIX_F_OFFSET + PREFIX_F_LENGTH;
  30
  31         public static final int CONTENT_LENGTH = ATTRIBUTE_OFFSET + ATTRIBUTE_LENGTH;
  32
  33         public static XROIPPrefixSubobject parse(final byte[] soContentsBytes, final boolean mandatory) throws PCEPDeserializerException {
  34                 if (soContentsBytes == null || soContentsBytes.length == 0)
  35                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  36                 if (soContentsBytes.length != CONTENT_LENGTH)
  37                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + soContentsBytes.length + "; Expected: "
  38                                         + CONTENT_LENGTH + ".");
  39
  40                 final int length = UnsignedBytes.toInt(soContentsBytes[PREFIX_F_OFFSET]);
  41
  42                 return new XROIPPrefixSubobject(new IpPrefix(Ipv6Util.prefixForBytes(ByteArray.subByte(soContentsBytes, IP_F_OFFSET, IP_F_LENGTH),
  43                                 length)), mandatory, XROSubobjectAttributeMapping.getInstance().getFromAttributeIdentifier(
  44                                 (short) (soContentsBytes[ATTRIBUTE_OFFSET] & 0xFF)));
  45         }
  46
  47         public static byte[] put(final ExcludeRouteSubobject objToSerialize) {
  48                 if (!(objToSerialize instanceof XROIPPrefixSubobject))
  49                         throw new IllegalArgumentException("Unknown PCEPXROSubobject instance. Passed " + objToSerialize.getClass()
  50                                         + ". Needed XROIPPrefixSubobject.");
  51
  52                 final XROIPPrefixSubobject specObj = (XROIPPrefixSubobject) objToSerialize;
  53                 final IpPrefix prefix = specObj.getPrefix();
  54
  55                 if (prefix.getIpv4Prefix() != null)
  56                         throw new IllegalArgumentException("Unknown AbstractPrefix instance. Passed " + prefix.getClass() + ". Needed IPv6Prefix.");
  57
  58                 final byte[] retBytes = new byte[CONTENT_LENGTH];
  59
  60                 ByteArray.copyWhole(prefix.getIpv4Prefix().getValue().getBytes(), retBytes, IP_F_OFFSET);
  61                 // retBytes[PREFIX_F_OFFSET] = (byte) prefix.getLength();
  62                 retBytes[ATTRIBUTE_OFFSET] = (byte) XROSubobjectAttributeMapping.getInstance().getFromAttributeEnum(specObj.getAttribute());
  63
  64                 return retBytes;
  65         }
  66 }