rsvp/impl/src/main/java/org/opendaylight/protocol/rsvp/parser/impl/te/ProtectionCommonParser.java

   1 /*
   2  * Copyright (c) 2015 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
   9 package org.opendaylight.protocol.rsvp.parser.impl.te;
  10
  11 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedByte;
  12
  13 import io.netty.buffer.ByteBuf;
  14 import org.opendaylight.protocol.rsvp.parser.spi.RSVPParsingException;
  15 import org.opendaylight.protocol.util.BitArray;
  16 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.LinkFlags;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.LspFlag;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.protection.subobject.ProtectionSubobject;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.protection.subobject.ProtectionSubobjectBuilder;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 public class ProtectionCommonParser {
  25
  26     protected static final int BYTE_SIZE = 1;
  27     protected static final short PROTECTION_SUBOBJECT_TYPE_1 = 1;
  28     protected static final short PROTECTION_SUBOBJECT_TYPE_2 = 2;
  29     protected static final int CONTENT_LENGTH_C2 = 8;
  30     private static final int SECONDARY = 0;
  31     private static final int PROTECTING = 1;
  32     private static final int NOTIFICATION = 2;
  33     private static final int OPERATIONAL = 3;
  34     private static final int IN_PLACE = 0;
  35     private static final int REQUIRED = 1;
  36     private static final int FLAGS_SIZE = 8;
  37     private static final Logger LOG = LoggerFactory.getLogger(ProtectionCommonParser.class);
  38
  39     protected static void serializeBodyType1(final ProtectionSubobject protObj, final ByteBuf output) {
  40         final BitArray flagBitArray = new BitArray(FLAGS_SIZE);
  41         flagBitArray.set(SECONDARY, protObj.isSecondary());
  42         flagBitArray.toByteBuf(output);
  43         output.writeZero(ByteBufWriteUtil.SHORT_BYTES_LENGTH);
  44         output.writeByte(protObj.getLinkFlags().getIntValue());
  45     }
  46
  47     protected static void serializeBodyType2(final ProtectionSubobject protObj, final ByteBuf output) {
  48         final BitArray flagBitArray = new BitArray(FLAGS_SIZE);
  49         flagBitArray.set(SECONDARY, protObj.isSecondary());
  50         flagBitArray.set(PROTECTING, protObj.isProtecting());
  51         flagBitArray.set(NOTIFICATION, protObj.isNotification());
  52         flagBitArray.set(OPERATIONAL, protObj.isOperational());
  53         flagBitArray.toByteBuf(output);
  54         output.writeByte(protObj.getLspFlag().getIntValue());
  55         output.writeZero(BYTE_SIZE);
  56         output.writeByte(protObj.getLinkFlags().getIntValue());
  57         final BitArray flagInPlaceBitArray = new BitArray(FLAGS_SIZE);
  58         flagInPlaceBitArray.set(IN_PLACE, protObj.isInPlace());
  59         flagInPlaceBitArray.set(REQUIRED, protObj.isRequired());
  60         flagInPlaceBitArray.toByteBuf(output);
  61         output.writeByte(protObj.getSegFlag().getIntValue());
  62         output.writeZero(ByteBufWriteUtil.SHORT_BYTES_LENGTH);
  63     }
  64
  65     protected static ProtectionSubobject parseCommonProtectionBodyType2(final ByteBuf byteBuf) throws
  66         RSVPParsingException {
  67         if (byteBuf.readableBytes() != CONTENT_LENGTH_C2) {
  68             throw new RSVPParsingException("Wrong length of array of bytes. Passed: " + byteBuf.readableBytes() + "; "
  69                 + "Expected: " + CONTENT_LENGTH_C2 + ".");
  70         }
  71         final ProtectionSubobjectBuilder sub = new ProtectionSubobjectBuilder();
  72         final BitArray protectionFlag = BitArray.valueOf(byteBuf.readByte());
  73         sub.setSecondary(protectionFlag.get(SECONDARY));
  74         sub.setProtecting(protectionFlag.get(PROTECTING));
  75         sub.setNotification(protectionFlag.get(NOTIFICATION));
  76         sub.setOperational(protectionFlag.get(OPERATIONAL));
  77
  78         final int lspFlags = byteBuf.readByte();
  79         sub.setLspFlag(LspFlag.forValue(lspFlags)).build();
  80         //Skip Reserved
  81         byteBuf.skipBytes(ByteBufWriteUtil.ONE_BYTE_LENGTH);
  82         final int linkFlags = byteBuf.readByte();
  83         sub.setLinkFlags(LinkFlags.forValue(linkFlags));
  84
  85         final BitArray bitArray2 = BitArray.valueOf(byteBuf.readByte());
  86         sub.setInPlace(bitArray2.get(IN_PLACE));
  87         sub.setRequired(bitArray2.get(REQUIRED));
  88
  89         final int segFlags = byteBuf.readByte();
  90         sub.setSegFlag(LspFlag.forValue(segFlags));
  91         byteBuf.skipBytes(ByteBufWriteUtil.SHORT_BYTES_LENGTH);
  92         return sub.build();
  93     }
  94
  95     protected static ProtectionSubobject parseCommonProtectionBodyType1(final ByteBuf byteBuf) {
  96         final BitArray bitArray = BitArray.valueOf(byteBuf.readByte());
  97         final ProtectionSubobjectBuilder sub = new ProtectionSubobjectBuilder();
  98         sub.setSecondary(bitArray.get(SECONDARY));
  99         //Skip Reserved
 100         byteBuf.skipBytes(ByteBufWriteUtil.SHORT_BYTES_LENGTH);
 101         final int linkFlags = byteBuf.readByte();
 102         sub.setLinkFlags(LinkFlags.forValue(linkFlags));
 103         return sub.build();
 104     }
 105
 106     protected static void serializeBody(final Short ctype, final ProtectionSubobject protObj,
 107         final ByteBuf output) {
 108         output.writeZero(BYTE_SIZE);
 109         writeUnsignedByte(ctype, output);
 110         switch (ctype) {
 111             case PROTECTION_SUBOBJECT_TYPE_1:
 112                 serializeBodyType1(protObj, output);
 113                 break;
 114             case PROTECTION_SUBOBJECT_TYPE_2:
 115                 serializeBodyType2(protObj, output);
 116                 break;
 117             default:
 118                 LOG.warn("Secondary Record Route Protection Subobject cType {} not supported", ctype);
 119                 break;
 120         }
 121     }
 122
 123     protected static ProtectionSubobject parseCommonProtectionBody(final short ctype, final ByteBuf byteBuf)
 124         throws RSVPParsingException {
 125         ProtectionSubobject protectionSubobject = null;
 126         switch (ctype) {
 127             case PROTECTION_SUBOBJECT_TYPE_1:
 128                 protectionSubobject = parseCommonProtectionBodyType1(byteBuf);
 129                 break;
 130             case PROTECTION_SUBOBJECT_TYPE_2:
 131                 protectionSubobject = parseCommonProtectionBodyType2(byteBuf);
 132                 break;
 133             default:
 134                 LOG.warn("Secondary Record Route Protection Subobject cType {} not supported", ctype);
 135                 break;
 136         }
 137         return protectionSubobject;
 138     }
 139 }