pcep/ietf-stateful/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful/StatefulLSPIdentifierIpv4TlvParser.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.ietf.stateful;
   9
  10 import static com.google.common.base.Preconditions.checkArgument;
  11
  12 import io.netty.buffer.ByteBuf;
  13 import io.netty.buffer.Unpooled;
  14 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  15 import org.opendaylight.protocol.pcep.spi.TlvParser;
  16 import org.opendaylight.protocol.pcep.spi.TlvSerializer;
  17 import org.opendaylight.protocol.pcep.spi.TlvUtil;
  18 import org.opendaylight.protocol.util.Ipv4Util;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.LspIdentifiers;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.LspIdentifiersBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.lsp.identifiers.AddressFamily;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.lsp.identifiers.address.family.Ipv4Case;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.lsp.identifiers.address.family.Ipv4CaseBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.lsp.identifiers.address.family.Ipv6Case;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.lsp.identifiers.address.family.ipv4._case.Ipv4;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.lsp.identifiers.address.family.ipv4._case.Ipv4Builder;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Tlv;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.Ipv4ExtendedTunnelId;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.LspId;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.TunnelId;
  31 import org.opendaylight.yangtools.yang.common.Uint32;
  32 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
  33
  34 /**
  35  * Parser for {@link LspIdentifiers}.
  36  */
  37 public final class StatefulLSPIdentifierIpv4TlvParser implements TlvParser, TlvSerializer {
  38     public static final int TYPE = 18;
  39
  40     private static final int V4_LENGTH = 16;
  41
  42     @Override
  43     public LspIdentifiers parseTlv(final ByteBuf buffer) throws PCEPDeserializerException {
  44         if (buffer == null) {
  45             return null;
  46         }
  47         checkArgument(buffer.readableBytes() == V4_LENGTH, "Length %s does not match LSP Identifiers Ipv4 tlv length.",
  48                 buffer.readableBytes());
  49         final Ipv4Builder builder = new Ipv4Builder()
  50                 .setIpv4TunnelSenderAddress(Ipv4Util.addressForByteBuf(buffer));
  51         final LspId lspId = new LspId(Uint32.valueOf(buffer.readUnsignedShort()));
  52         final TunnelId tunnelId = new TunnelId(ByteBufUtils.readUint16(buffer));
  53         builder.setIpv4ExtendedTunnelId(new Ipv4ExtendedTunnelId(Ipv4Util.addressForByteBuf(buffer)));
  54         builder.setIpv4TunnelEndpointAddress(Ipv4Util.addressForByteBuf(buffer));
  55         final AddressFamily afi = new Ipv4CaseBuilder().setIpv4(builder.build()).build();
  56         return new LspIdentifiersBuilder()
  57                 .setAddressFamily(afi)
  58                 .setLspId(lspId)
  59                 .setTunnelId(tunnelId)
  60                 .build();
  61     }
  62
  63     @Override
  64     public void serializeTlv(final Tlv tlv, final ByteBuf buffer) {
  65         checkArgument(tlv instanceof LspIdentifiers, "LspIdentifiersTlv is mandatory.");
  66         final LspIdentifiers lsp = (LspIdentifiers) tlv;
  67         final AddressFamily afi = lsp.getAddressFamily();
  68         final ByteBuf body = Unpooled.buffer();
  69         if (afi.implementedInterface().equals(Ipv6Case.class)) {
  70             new StatefulLSPIdentifierIpv6TlvParser().serializeTlv(tlv, buffer);
  71         }
  72         final Ipv4 ipv4 = ((Ipv4Case) afi).getIpv4();
  73         checkArgument(ipv4.getIpv4TunnelSenderAddress() != null, "Ipv4TunnelSenderAddress is mandatory.");
  74         Ipv4Util.writeIpv4Address(ipv4.getIpv4TunnelSenderAddress(), body);
  75         checkArgument(lsp.getLspId() != null, "LspId is mandatory.");
  76         body.writeShort(lsp.getLspId().getValue().shortValue());
  77         final TunnelId tunnelId = lsp.getTunnelId();
  78         checkArgument(tunnelId != null, "TunnelId is mandatory.");
  79         ByteBufUtils.write(body, tunnelId.getValue());
  80         checkArgument(ipv4.getIpv4ExtendedTunnelId() != null, "Ipv4ExtendedTunnelId is mandatory.");
  81         Ipv4Util.writeIpv4Address(ipv4.getIpv4ExtendedTunnelId(), body);
  82         checkArgument(ipv4.getIpv4TunnelEndpointAddress() != null, "Ipv4TunnelEndpointAddress is mandatory.");
  83         Ipv4Util.writeIpv4Address(ipv4.getIpv4TunnelEndpointAddress(), body);
  84         TlvUtil.formatTlv(TYPE, body, buffer);
  85     }
  86 }