pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/RROUnnumberedInterfaceSubobjectParser.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.RROUnnumberedInterfaceSubobject;
  15 import org.opendaylight.protocol.pcep.subobject.ReportedRouteSubobject;
  16 import com.google.common.primitives.UnsignedInts;
  17
  18 /**
  19  * Parser for
  20  * {@link org.opendaylight.protocol.pcep.subobject.RROUnnumberedInterfaceSubobject
  21  * RROUnnumberedInterfaceSubobject}
  22  */
  23 public class RROUnnumberedInterfaceSubobjectParser {
  24         public static final int ROUTER_ID_NUMBER_LENGTH = 4;
  25         public static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  26
  27         public static final int ROUTER_ID_NUMBER_OFFSET = 2; // added reserved field of size 2
  28         public static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  29
  30         public static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  31
  32         public static RROUnnumberedInterfaceSubobject parse(byte[] soContentsBytes) throws PCEPDeserializerException {
  33                 if (soContentsBytes == null || soContentsBytes.length == 0)
  34                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  35                 if (soContentsBytes.length != CONTENT_LENGTH)
  36                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + soContentsBytes.length + "; Expected: " + CONTENT_LENGTH + ".");
  37
  38                 return new RROUnnumberedInterfaceSubobject(new IPv4Address(
  39                                 ByteArray.subByte(soContentsBytes, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)), new UnnumberedInterfaceIdentifier(
  40                                 UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(soContentsBytes, INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH)))));
  41         }
  42
  43         public static byte[] put(ReportedRouteSubobject objToSerialize) {
  44                 if (!(objToSerialize instanceof RROUnnumberedInterfaceSubobject))
  45                         throw new IllegalArgumentException("Unknown ReportedRouteSubobject instance. Passed " + objToSerialize.getClass()
  46                                         + ". Needed RROUnnumberedInterfaceSubobject.");
  47
  48                 byte[] retBytes;
  49                 retBytes = new byte[CONTENT_LENGTH];
  50                 final RROUnnumberedInterfaceSubobject specObj = (RROUnnumberedInterfaceSubobject) objToSerialize;
  51
  52                 ByteArray.copyWhole(specObj.getRouterID().getAddress(), retBytes, ROUTER_ID_NUMBER_OFFSET);
  53                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceID().getInterfaceId()), Long.SIZE / Byte.SIZE - INTERFACE_ID_NUMBER_LENGTH, retBytes,
  54                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  55
  56                 return retBytes;
  57         }
  58 }