pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPCloseObjectParser.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.object;
   9
  10 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  11 import org.opendaylight.protocol.pcep.PCEPObject;
  12 import org.opendaylight.protocol.pcep.impl.PCEPObjectParser;
  13 import org.opendaylight.protocol.pcep.impl.PCEPTlvParser;
  14 import org.opendaylight.protocol.pcep.object.PCEPCloseObject;
  15 import org.opendaylight.protocol.pcep.object.PCEPCloseObject.Reason;
  16 import org.opendaylight.protocol.util.ByteArray;
  17
  18 /**
  19  * Parser for {@link org.opendaylight.protocol.pcep.object.PCEPCloseObject PCEPCloseObject}
  20  */
  21 public class PCEPCloseObjectParser implements PCEPObjectParser {
  22
  23         /*
  24          * lengths of fields in bytes
  25          */
  26         public static final int FLAGS_F_LENGTH = 1;
  27         public static final int REASON_F_LENGTH = 1;
  28
  29         /*
  30          * offsets of fields in bytes
  31          */
  32         public static final int FLAGS_F_OFFSET = 2; // added reserved field of size 2 bytes
  33         public static final int REASON_F_OFFSET = FLAGS_F_OFFSET + FLAGS_F_LENGTH;
  34
  35         /*
  36          * total size of object in bytes
  37          */
  38         public static final int TLVS_F_OFFSET = REASON_F_OFFSET + REASON_F_LENGTH;
  39
  40         @Override
  41         public PCEPObject parse(byte[] bytes, boolean processed, boolean ignored) throws PCEPDeserializerException {
  42                 if (bytes == null)
  43                         throw new IllegalArgumentException("Byte array is mandatory.");
  44
  45                 if (bytes.length != TLVS_F_OFFSET)
  46                         throw new PCEPDeserializerException("Size of byte array doesn't match defined size. Expected: " + TLVS_F_OFFSET + "; Passed: " + bytes.length);
  47
  48                 Reason reason;
  49                 switch ((short) (bytes[REASON_F_OFFSET] & 0xFF)) {
  50                         case 1:
  51                                 reason = Reason.UNKNOWN;
  52                                 break;
  53                         case 2:
  54                                 reason = Reason.EXP_DEADTIMER;
  55                                 break;
  56                         case 3:
  57                                 reason = Reason.MALFORMED_MSG;
  58                                 break;
  59                         case 4:
  60                                 reason = Reason.TOO_MANY_UNKNOWN_REQ_REP;
  61                                 break;
  62                         case 5:
  63                                 reason = Reason.TOO_MANY_UNKNOWN_MSG;
  64                                 break;
  65                         default:
  66                                 reason = Reason.UNKNOWN;
  67                                 break;
  68                 }
  69
  70                 return new PCEPCloseObject(reason, PCEPTlvParser.parse(ByteArray.cutBytes(bytes, TLVS_F_OFFSET)));
  71         }
  72
  73         @Override
  74         public byte[] put(PCEPObject obj) {
  75                 if (!(obj instanceof PCEPCloseObject))
  76                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + obj.getClass() + ". Needed PCEPCloseObject.");
  77
  78                 final byte[] tlvs = PCEPTlvParser.put(((PCEPCloseObject) obj).getTlvs());
  79                 final byte[] retBytes = new byte[TLVS_F_OFFSET + tlvs.length];
  80                 ByteArray.copyWhole(tlvs, retBytes, TLVS_F_OFFSET);
  81
  82                 int reason;
  83                 switch (((PCEPCloseObject) obj).getReason()) {
  84                         case UNKNOWN:
  85                                 reason = 1;
  86                                 break;
  87                         case EXP_DEADTIMER:
  88                                 reason = 2;
  89                                 break;
  90                         case MALFORMED_MSG:
  91                                 reason = 3;
  92                                 break;
  93                         case TOO_MANY_UNKNOWN_REQ_REP:
  94                                 reason = 4;
  95                                 break;
  96                         case TOO_MANY_UNKNOWN_MSG:
  97                                 reason = 5;
  98                                 break;
  99                         default:
 100                                 reason = 1;
 101                                 break;
 102                 }
 103
 104                 retBytes[REASON_F_OFFSET] = (byte) reason;
 105
 106                 return retBytes;
 107         }
 108
 109 }