pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/EROUnnumberedInterfaceSubobjectParser.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.EROUnnumberedInterfaceSubobject;
  15 import org.opendaylight.protocol.pcep.subobject.ExplicitRouteSubobject;
  16 import com.google.common.primitives.UnsignedInts;
  17
  18 /**
  19  * Parser for
  20  * {@link org.opendaylight.protocol.pcep.subobject.EROUnnumberedInterfaceSubobject
  21  * EROUnnumberedInterfaceSubobject}
  22  */
  23 public class EROUnnumberedInterfaceSubobjectParser {
  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 EROUnnumberedInterfaceSubobject parse(byte[] soContentsBytes, boolean loose) 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 EROUnnumberedInterfaceSubobject(new IPv4Address(ByteArray.subByte(soContentsBytes, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)), new UnnumberedInterfaceIdentifier(
  39                                 UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(soContentsBytes, INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH)))), loose);
  40         }
  41
  42         public static byte[] put(ExplicitRouteSubobject objToSerialize) {
  43                 if (!(objToSerialize instanceof EROUnnumberedInterfaceSubobject))
  44                         throw new IllegalArgumentException("Unknown ExplicitRouteSubobject instance. Passed " + objToSerialize.getClass()
  45                                         + ". Needed EROUnnumberedInterfaceSubobject.");
  46
  47                 byte[] retBytes;
  48                 retBytes = new byte[CONTENT_LENGTH];
  49                 final EROUnnumberedInterfaceSubobject specObj = (EROUnnumberedInterfaceSubobject) objToSerialize;
  50
  51                 ByteArray.copyWhole(specObj.getRouterID().getAddress(), retBytes, ROUTER_ID_NUMBER_OFFSET);
  52                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceID().getInterfaceId()), Long.SIZE / Byte.SIZE - INTERFACE_ID_NUMBER_LENGTH, retBytes,
  53                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  54
  55                 return retBytes;
  56         }
  57 }