pcep/segment-routing/src/main/java/org/opendaylight/protocol/pcep/segment/routing02/SrEroSubobjectParser.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
   9 package org.opendaylight.protocol.pcep.segment.routing02;
  10
  11 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeBitSet;
  12 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeIpv4Address;
  13 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeIpv6Address;
  14 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedByte;
  15 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedInt;
  16
  17 import com.google.common.base.Preconditions;
  18 import io.netty.buffer.ByteBuf;
  19 import io.netty.buffer.Unpooled;
  20 import java.util.BitSet;
  21 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
  22 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
  23 import org.opendaylight.protocol.pcep.spi.EROSubobjectUtil;
  24 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  25 import org.opendaylight.protocol.util.ByteArray;
  26 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  27 import org.opendaylight.protocol.util.Ipv4Util;
  28 import org.opendaylight.protocol.util.Ipv6Util;
  29 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
  30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.SidType;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.SrEroSubobject;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.SrEroSubobject.Flags;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.add.lsp.input.arguments.ero.subobject.subobject.type.SrEroTypeBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.sr.ero.subobject.Nai;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.sr.ero.subobject.nai.IpAdjacency;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.sr.ero.subobject.nai.IpAdjacencyBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.sr.ero.subobject.nai.IpNodeId;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.sr.ero.subobject.nai.IpNodeIdBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.sr.ero.subobject.nai.UnnumberedAdjacency;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.segment.routing._02.rev140506.sr.ero.subobject.nai.UnnumberedAdjacencyBuilder;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
  44
  45 public class SrEroSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
  46
  47     public static final int TYPE = 5;
  48
  49     private static final int SID_LENGTH = 4;
  50     private static final int FLAGS_OFFSET = 1;
  51     private static final int HEADER_LENGTH = FLAGS_OFFSET + 1;
  52     private static final int MINIMAL_LENGTH = SID_LENGTH + HEADER_LENGTH;
  53     private static final int SID_TYPE_BITS_OFFSET = 4;
  54
  55     private static final int M_FLAG_POSITION = 7;
  56     private static final int C_FLAG_POSITION = 6;
  57     private static final int S_FLAG_POSITION = 5;
  58     private static final int F_FLAG_POSITION = 4;
  59
  60     @Override
  61     public void serializeSubobject(Subobject subobject, final ByteBuf buffer) {
  62         Preconditions.checkArgument(subobject.getSubobjectType() instanceof SrEroSubobject,
  63                 "Unknown subobject instance. Passed %s. Needed SrEroSubobject.", subobject.getSubobjectType()
  64                         .getClass());
  65
  66         final SrEroSubobject srEroSubobject = (SrEroSubobject) subobject.getSubobjectType();
  67         final ByteBuf body = Unpooled.buffer(MINIMAL_LENGTH);
  68         writeUnsignedByte((short)(srEroSubobject.getSidType().getIntValue() << SID_TYPE_BITS_OFFSET), body);
  69
  70         final Flags flags = srEroSubobject.getFlags();
  71         final BitSet bits = new BitSet();
  72         if (flags != null) {
  73             bits.set(M_FLAG_POSITION, flags.isM());
  74             bits.set(C_FLAG_POSITION, flags.isC());
  75             bits.set(S_FLAG_POSITION, flags.isS());
  76             bits.set(F_FLAG_POSITION, flags.isF());
  77         }
  78         writeBitSet(bits, FLAGS_OFFSET, body);
  79
  80         writeUnsignedInt(srEroSubobject.getSid(), body);
  81
  82         final Nai nai = srEroSubobject.getNai();
  83         if (nai != null) {
  84             switch (srEroSubobject.getSidType()) {
  85             case Ipv4NodeId:
  86                 writeIpv4Address(((IpNodeId) nai).getIpAddress().getIpv4Address(), body);
  87                 break;
  88             case Ipv6NodeId:
  89                 writeIpv6Address(((IpNodeId) nai).getIpAddress().getIpv6Address(), body);
  90                 break;
  91             case Ipv4Adjacency:
  92                 writeIpv4Address(((IpAdjacency) nai).getLocalIpAddress().getIpv4Address(), body);
  93                 writeIpv4Address(((IpAdjacency) nai).getRemoteIpAddress().getIpv4Address(), body);
  94                 break;
  95             case Ipv6Adjacency:
  96                 writeIpv6Address(((IpAdjacency) nai).getLocalIpAddress().getIpv6Address(), body);
  97                 writeIpv6Address(((IpAdjacency) nai).getRemoteIpAddress().getIpv6Address(), body);
  98                 break;
  99             case Unnumbered:
 100                 final UnnumberedAdjacency unnumbered = (UnnumberedAdjacency) nai;
 101                 ByteBufWriteUtil.writeUnsignedInt(unnumbered.getLocalNodeId(), body);
 102                 ByteBufWriteUtil.writeUnsignedInt(unnumbered.getLocalInterfaceId(), body);
 103                 ByteBufWriteUtil.writeUnsignedInt(unnumbered.getRemoteNodeId(), body);
 104                 ByteBufWriteUtil.writeUnsignedInt(unnumbered.getRemoteInterfaceId(), body);
 105                 break;
 106             }
 107         }
 108         EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), body, buffer);
 109     }
 110
 111     @Override
 112     public Subobject parseSubobject(ByteBuf buffer, boolean loose) throws PCEPDeserializerException {
 113         Preconditions.checkArgument(buffer != null && buffer.isReadable(),
 114                 "Array of bytes is mandatory. Can't be null or empty.");
 115         if (buffer.readableBytes() <= MINIMAL_LENGTH) {
 116             throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes()
 117                     + ";");
 118         }
 119         final SrEroTypeBuilder srEroSubobjectBuilder = new SrEroTypeBuilder();
 120         final int sidTypeByte = buffer.readByte() >> SID_TYPE_BITS_OFFSET;
 121         final SidType sidType = SidType.forValue(sidTypeByte);
 122         srEroSubobjectBuilder.setSidType(sidType);
 123
 124         BitSet bitSet = ByteArray.bytesToBitSet(new byte[] { buffer.readByte() });
 125         final boolean f = bitSet.get(F_FLAG_POSITION);
 126         final boolean s = bitSet.get(S_FLAG_POSITION);
 127         final boolean c = bitSet.get(C_FLAG_POSITION);
 128         final boolean m = bitSet.get(M_FLAG_POSITION);
 129         final Flags flags = new Flags(c, f, m, s);
 130         srEroSubobjectBuilder.setFlags(flags);
 131
 132         final long sid = buffer.readUnsignedInt();
 133         srEroSubobjectBuilder.setSid(sid);
 134         if (sidType != null) {
 135             switch (sidType) {
 136             case Ipv4NodeId:
 137                 srEroSubobjectBuilder.setNai(new IpNodeIdBuilder().setIpAddress(
 138                         new IpAddress(new Ipv4Address(Ipv4Util.addressForByteBuf(buffer)))).build());
 139                 break;
 140             case Ipv6NodeId:
 141                 srEroSubobjectBuilder.setNai(new IpNodeIdBuilder().setIpAddress(
 142                         new IpAddress(Ipv6Util.addressForByteBuf(buffer))).build());
 143                 break;
 144             case Ipv4Adjacency:
 145                 srEroSubobjectBuilder.setNai(new IpAdjacencyBuilder()
 146                         .setLocalIpAddress(new IpAddress(Ipv4Util.addressForByteBuf(buffer)))
 147                         .setRemoteIpAddress(new IpAddress(Ipv4Util.addressForByteBuf(buffer))).build());
 148                 break;
 149             case Ipv6Adjacency:
 150                 srEroSubobjectBuilder.setNai(new IpAdjacencyBuilder()
 151                         .setLocalIpAddress(new IpAddress(Ipv6Util.addressForByteBuf(buffer)))
 152                         .setRemoteIpAddress(new IpAddress(Ipv6Util.addressForByteBuf(buffer))).build());
 153                 break;
 154             case Unnumbered:
 155                 srEroSubobjectBuilder.setNai(new UnnumberedAdjacencyBuilder().setLocalNodeId(buffer.readUnsignedInt())
 156                         .setLocalInterfaceId(buffer.readUnsignedInt()).setRemoteNodeId(buffer.readUnsignedInt())
 157                         .setRemoteInterfaceId(buffer.readUnsignedInt()).build());
 158                 break;
 159             }
 160         }
 161         final SubobjectBuilder subobjectBuilder = new SubobjectBuilder();
 162         subobjectBuilder.setLoose(loose);
 163         subobjectBuilder.setSubobjectType(srEroSubobjectBuilder.build());
 164         return subobjectBuilder.build();
 165     }
 166
 167 }