pcep/ietf-stateful02/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful02/Stateful02LspObjectParser.java

   1 /*
   2  * Copyright (c) 2014 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.ietf.stateful02;
   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.crabbe.stateful._02.rev140110.PlspId;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.db.version.tlv.LspDbVersion;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.object.Lsp;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.object.LspBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.object.lsp.Tlvs;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.object.lsp.TlvsBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.rsvp.error.spec.tlv.RsvpErrorSpec;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.symbolic.path.name.tlv.SymbolicPathName;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  28
  29 /**
  30  * Parser for {@link Lsp}
  31  */
  32 public final class Stateful02LspObjectParser extends AbstractObjectWithTlvsParser<TlvsBuilder> {
  33
  34         public static final int CLASS = 32;
  35
  36         public static final int TYPE = 1;
  37
  38         /*
  39          * offset of TLVs offset of other fields are not defined as constants
  40          * because of non-standard mapping of bits
  41          */
  42         private static final int TLVS_OFFSET = 4;
  43
  44         /*
  45          * 12b extended to 16b so first 4b are restricted (belongs to LSP ID)
  46          */
  47         private static final int DELEGATE_FLAG_OFFSET = 15;
  48         private static final int SYNC_FLAG_OFFSET = 14;
  49         private static final int REMOVE_FLAG_OFFSET = 12;
  50         private static final int OPERATIONAL_FLAG_OFFSET = 13;
  51
  52         public Stateful02LspObjectParser(final TlvHandlerRegistry tlvReg) {
  53                 super(tlvReg);
  54         }
  55
  56         @Override
  57         public Lsp parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException {
  58                 if (bytes == null || bytes.length == 0) {
  59                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  60                 }
  61                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(bytes, 2, 2));
  62
  63                 final LspBuilder builder = new LspBuilder();
  64                 builder.setIgnore(header.isIgnore());
  65                 builder.setProcessingRule(header.isProcessingRule());
  66
  67                 builder.setPlspId(new PlspId((ByteArray.bytesToLong(ByteArray.subByte(bytes, 0, 2)) & 0xFFFF) << 4 | (bytes[2] & 0xFF) >> 4));
  68                 builder.setDelegate(flags.get(DELEGATE_FLAG_OFFSET));
  69                 builder.setSync(flags.get(SYNC_FLAG_OFFSET));
  70                 builder.setRemove(flags.get(REMOVE_FLAG_OFFSET));
  71                 builder.setOperational(flags.get(OPERATIONAL_FLAG_OFFSET));
  72                 final TlvsBuilder b = new TlvsBuilder();
  73                 parseTlvs(b, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  74                 builder.setTlvs(b.build());
  75                 return builder.build();
  76         }
  77
  78         @Override
  79         public void addTlv(final TlvsBuilder builder, final Tlv tlv) {
  80                 if (tlv instanceof RsvpErrorSpec) {
  81                         builder.setRsvpErrorSpec((RsvpErrorSpec) tlv);
  82                 } else if (tlv instanceof SymbolicPathName) {
  83                         builder.setSymbolicPathName((SymbolicPathName) tlv);
  84                 } else if (tlv instanceof LspDbVersion) {
  85                         builder.setLspDbVersion((LspDbVersion) tlv);
  86                 }
  87         }
  88
  89         @Override
  90         public byte[] serializeObject(final Object object) {
  91                 if (!(object instanceof Lsp)) {
  92                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed LspObject.");
  93                 }
  94                 final Lsp specObj = (Lsp) object;
  95
  96                 final byte[] tlvs = serializeTlvs(specObj.getTlvs());
  97                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvs.length + getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
  98
  99                 final int lspID = specObj.getPlspId().getValue().intValue();
 100                 retBytes[0] = (byte) (lspID >> 12);
 101                 retBytes[1] = (byte) (lspID >> 4);
 102                 retBytes[2] = (byte) (lspID << 4);
 103                 if (specObj.isDelegate() != null && specObj.isDelegate()) {
 104                         retBytes[3] |= 1 << (Byte.SIZE - (DELEGATE_FLAG_OFFSET - Byte.SIZE) - 1);
 105                 }
 106                 if (specObj.isRemove() != null && specObj.isRemove()) {
 107                         retBytes[3] |= 1 << (Byte.SIZE - (REMOVE_FLAG_OFFSET - Byte.SIZE) - 1);
 108                 }
 109                 if (specObj.isSync() != null && specObj.isSync()) {
 110                         retBytes[3] |= 1 << (Byte.SIZE - (SYNC_FLAG_OFFSET - Byte.SIZE) - 1);
 111                 }
 112                 if (specObj.isOperational() != null && specObj.isOperational()) {
 113                         retBytes[3] |= 1 << (Byte.SIZE - (OPERATIONAL_FLAG_OFFSET - Byte.SIZE) - 1);
 114                 }
 115                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
 116                 return ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), retBytes);
 117         }
 118
 119         public byte[] serializeTlvs(final Tlvs tlvs) {
 120                 if (tlvs == null) {
 121                         return new byte[0];
 122                 }
 123                 int finalLength = 0;
 124                 byte[] rsvpErrBytes = null;
 125                 byte[] symbBytes = null;
 126                 byte[] dbvBytes = null;
 127                 if (tlvs.getRsvpErrorSpec() != null) {
 128                         rsvpErrBytes = serializeTlv(tlvs.getRsvpErrorSpec());
 129                         finalLength += rsvpErrBytes.length;
 130                 }
 131                 if (tlvs.getSymbolicPathName() != null) {
 132                         symbBytes = serializeTlv(tlvs.getSymbolicPathName());
 133                         finalLength += symbBytes.length;
 134                 }
 135                 if (tlvs.getLspDbVersion() != null) {
 136                         dbvBytes = serializeTlv(tlvs.getLspDbVersion());
 137                         finalLength += dbvBytes.length;
 138                 }
 139                 int offset = 0;
 140                 final byte[] result = new byte[finalLength];
 141                 if (rsvpErrBytes != null) {
 142                         ByteArray.copyWhole(rsvpErrBytes, result, offset);
 143                         offset += rsvpErrBytes.length;
 144                 }
 145                 if (symbBytes != null) {
 146                         ByteArray.copyWhole(symbBytes, result, offset);
 147                         offset += symbBytes.length;
 148                 }
 149                 if (dbvBytes != null) {
 150                         ByteArray.copyWhole(dbvBytes, result, offset);
 151                         offset += dbvBytes.length;
 152                 }
 153                 return result;
 154         }
 155
 156         @Override
 157         public int getObjectType() {
 158                 return TYPE;
 159         }
 160
 161         @Override
 162         public int getObjectClass() {
 163                 return CLASS;
 164         }
 165 }