pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPLspaObjectParser.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 java.util.BitSet;
  11
  12 import org.opendaylight.protocol.pcep.spi.AbstractObjectWithTlvsParser;
  13 import org.opendaylight.protocol.pcep.spi.ObjectUtil;
  14 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  15 import org.opendaylight.protocol.pcep.spi.TlvHandlerRegistry;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.Lspa;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.LspaBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.lspa.Tlvs;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.lspa.TlvsBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.AttributeFilter;
  24
  25 import com.google.common.primitives.UnsignedBytes;
  26
  27 /**
  28  * Parser for {@link Lspa}
  29  */
  30 public class PCEPLspaObjectParser extends AbstractObjectWithTlvsParser<TlvsBuilder> {
  31
  32         public static final int CLASS = 9;
  33
  34         public static final int TYPE = 1;
  35
  36         /*
  37          * lengths of fields in bytes
  38          */
  39         private static final int EXC_ANY_F_LENGTH = 4;
  40         private static final int INC_ANY_F_LENGTH = 4;
  41         private static final int INC_ALL_F_LENGTH = 4;
  42         private static final int SET_PRIO_F_LENGTH = 1;
  43         private static final int HOLD_PRIO_F_LENGTH = 1;
  44         private static final int FLAGS_F_LENGTH = 1;
  45
  46         /*
  47          * offsets of flags inside flags field in bits
  48          */
  49         private static final int L_FLAG_OFFSET = 7;
  50
  51         /*
  52          * offsets of fields in bytes
  53          */
  54         private static final int EXC_ANY_F_OFFSET = 0;
  55         private static final int INC_ANY_F_OFFSET = EXC_ANY_F_OFFSET + EXC_ANY_F_LENGTH;
  56         private static final int INC_ALL_F_OFFSET = INC_ANY_F_OFFSET + INC_ANY_F_LENGTH;
  57         private static final int SET_PRIO_F_OFFSET = INC_ALL_F_OFFSET + INC_ALL_F_LENGTH;
  58         private static final int HOLD_PRIO_F_OFFSET = SET_PRIO_F_OFFSET + SET_PRIO_F_LENGTH;
  59         private static final int FLAGS_F_OFFSET = HOLD_PRIO_F_OFFSET + HOLD_PRIO_F_LENGTH;
  60         private static final int TLVS_F_OFFSET = FLAGS_F_OFFSET + FLAGS_F_LENGTH + 1;
  61
  62         public PCEPLspaObjectParser(final TlvHandlerRegistry tlvReg) {
  63                 super(tlvReg);
  64         }
  65
  66         @Override
  67         public Lspa parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException {
  68                 if (bytes == null) {
  69                         throw new IllegalArgumentException("Bytes array is mandatory.");
  70                 }
  71                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, FLAGS_F_OFFSET, FLAGS_F_LENGTH));
  72
  73                 final LspaBuilder builder = new LspaBuilder();
  74                 final TlvsBuilder tbuilder = new TlvsBuilder();
  75                 parseTlvs(tbuilder, ByteArray.cutBytes(bytes, TLVS_F_OFFSET));
  76                 builder.setTlvs(tbuilder.build());
  77
  78                 builder.setIgnore(header.isIgnore());
  79                 builder.setProcessingRule(header.isProcessingRule());
  80
  81                 builder.setHoldPriority((short) UnsignedBytes.toInt(bytes[HOLD_PRIO_F_OFFSET]));
  82                 builder.setSetupPriority((short) UnsignedBytes.toInt(bytes[SET_PRIO_F_OFFSET]));
  83                 builder.setLocalProtectionDesired(flags.get(L_FLAG_OFFSET));
  84                 builder.setExcludeAny(new AttributeFilter(ByteArray.bytesToLong(ByteArray.subByte(bytes, EXC_ANY_F_OFFSET, EXC_ANY_F_LENGTH))));
  85                 builder.setIncludeAll(new AttributeFilter(ByteArray.bytesToLong(ByteArray.subByte(bytes, INC_ALL_F_OFFSET, INC_ALL_F_LENGTH))));
  86                 builder.setIncludeAny(new AttributeFilter(ByteArray.bytesToLong(ByteArray.subByte(bytes, INC_ANY_F_OFFSET, INC_ANY_F_LENGTH))));
  87                 return builder.build();
  88         }
  89
  90         @Override
  91         public byte[] serializeObject(final Object object) {
  92                 if (!(object instanceof Lspa)) {
  93                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed LspaObject.");
  94                 }
  95                 final Lspa lspaObj = (Lspa) object;
  96
  97                 final byte[] tlvs = serializeTlvs(lspaObj.getTlvs());
  98                 final byte[] retBytes = new byte[TLVS_F_OFFSET + tlvs.length + getPadding(TLVS_F_OFFSET + tlvs.length, PADDED_TO)];
  99
 100                 if (lspaObj.getExcludeAny() != null) {
 101                         System.arraycopy(ByteArray.longToBytes(lspaObj.getExcludeAny().getValue(), EXC_ANY_F_LENGTH), 0, retBytes, EXC_ANY_F_OFFSET,
 102                                         EXC_ANY_F_LENGTH);
 103                 }
 104                 if (lspaObj.getIncludeAny() != null) {
 105                         System.arraycopy(ByteArray.longToBytes(lspaObj.getIncludeAny().getValue(), INC_ANY_F_LENGTH), 0, retBytes, INC_ANY_F_OFFSET,
 106                                         INC_ANY_F_LENGTH);
 107                 }
 108                 if (lspaObj.getIncludeAll() != null) {
 109                         System.arraycopy(ByteArray.longToBytes(lspaObj.getIncludeAll().getValue(), INC_ALL_F_LENGTH), 0, retBytes, INC_ALL_F_OFFSET,
 110                                         INC_ALL_F_LENGTH);
 111                 }
 112                 if (lspaObj.getSetupPriority() != null) {
 113                         retBytes[SET_PRIO_F_OFFSET] = UnsignedBytes.checkedCast(lspaObj.getSetupPriority());
 114                 }
 115                 if (lspaObj.getHoldPriority() != null) {
 116                         retBytes[HOLD_PRIO_F_OFFSET] = UnsignedBytes.checkedCast(lspaObj.getHoldPriority());
 117                 }
 118
 119                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
 120                 if (lspaObj.isLocalProtectionDesired() != null && lspaObj.isLocalProtectionDesired()) {
 121                         flags.set(L_FLAG_OFFSET, lspaObj.isLocalProtectionDesired());
 122                 }
 123                 ByteArray.copyWhole(ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH), retBytes, FLAGS_F_OFFSET);
 124                 ByteArray.copyWhole(tlvs, retBytes, TLVS_F_OFFSET);
 125                 return ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), retBytes);
 126         }
 127
 128         public byte[] serializeTlvs(final Tlvs tlvs) {
 129                 return new byte[0];
 130         }
 131
 132         @Override
 133         public int getObjectType() {
 134                 return TYPE;
 135         }
 136
 137         @Override
 138         public int getObjectClass() {
 139                 return CLASS;
 140         }
 141 }