pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/XROUnnumberedInterfaceSubobjectParser.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.util.ByteArray;
  11 import org.opendaylight.protocol.concepts.IPv4Address;
  12 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  13 import org.opendaylight.protocol.pcep.concepts.UnnumberedInterfaceIdentifier;
  14 import org.opendaylight.protocol.pcep.subobject.ExcludeRouteSubobject;
  15 import org.opendaylight.protocol.pcep.subobject.XROUnnumberedInterfaceSubobject;
  16 import com.google.common.primitives.UnsignedInts;
  17
  18 /**
  19  * Parser for
  20  * {@link org.opendaylight.protocol.pcep.subobject.XROUnnumberedInterfaceSubobject
  21  * XROUnnumberedInterfaceSubobject}
  22  */
  23 public class XROUnnumberedInterfaceSubobjectParser {
  24         public static final int ATTRIBUTE_LENGTH = 1;
  25         public static final int ROUTER_ID_NUMBER_LENGTH = 4;
  26         public static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  27
  28         public static final int ATTRIBUTE_OFFSET = 1;// added reserved field of size 1
  29         public static final int ROUTER_ID_NUMBER_OFFSET = ATTRIBUTE_OFFSET + ATTRIBUTE_LENGTH;
  30         public static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  31
  32         public static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  33
  34         public static XROUnnumberedInterfaceSubobject parse(byte[] soContentsBytes, boolean mandatory) throws PCEPDeserializerException {
  35                 if (soContentsBytes == null || soContentsBytes.length == 0)
  36                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  37                 if (soContentsBytes.length != CONTENT_LENGTH)
  38                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + soContentsBytes.length + "; Expected: " + CONTENT_LENGTH + ".");
  39
  40                 return new XROUnnumberedInterfaceSubobject(new IPv4Address(
  41                                 ByteArray.subByte(soContentsBytes, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)), new UnnumberedInterfaceIdentifier(
  42                                 UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(soContentsBytes, INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH)))),
  43                                 mandatory, XROSubobjectAttributeMapping.getInstance().getFromAttributeIdentifier((short) (soContentsBytes[ATTRIBUTE_OFFSET] & 0xFF)));
  44         }
  45
  46         public static byte[] put(ExcludeRouteSubobject objToSerialize) {
  47                 if (!(objToSerialize instanceof XROUnnumberedInterfaceSubobject))
  48                         throw new IllegalArgumentException("Unknown PCEPXROSubobject instance. Passed " + objToSerialize.getClass()
  49                                         + ". Needed XROUnnumberedInterfaceSubobject.");
  50
  51                 byte[] retBytes;
  52                 retBytes = new byte[CONTENT_LENGTH];
  53                 final XROUnnumberedInterfaceSubobject specObj = (XROUnnumberedInterfaceSubobject) objToSerialize;
  54
  55                 retBytes[ATTRIBUTE_OFFSET] = (byte) XROSubobjectAttributeMapping.getInstance().getFromAttributeEnum(specObj.getAttribute());
  56                 ByteArray.copyWhole(specObj.getRouterID().getAddress(), retBytes, ROUTER_ID_NUMBER_OFFSET);
  57                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceID().getInterfaceId()), Long.SIZE / Byte.SIZE - INTERFACE_ID_NUMBER_LENGTH, retBytes,
  58                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  59
  60                 return retBytes;
  61         }
  62 }