pcep/ietf-stateful07/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful07/Stateful07LSPIdentifierIpv4TlvParser.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.stateful07;
   9
  10 import com.google.common.base.Preconditions;
  11 import io.netty.buffer.ByteBuf;
  12 import io.netty.buffer.Unpooled;
  13 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  14 import org.opendaylight.protocol.pcep.spi.TlvParser;
  15 import org.opendaylight.protocol.pcep.spi.TlvSerializer;
  16 import org.opendaylight.protocol.pcep.spi.TlvUtil;
  17 import org.opendaylight.protocol.util.ByteArray;
  18 import org.opendaylight.protocol.util.Ipv4Util;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.LspIdentifiers;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.LspIdentifiersBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.lsp.identifiers.AddressFamily;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.lsp.identifiers.address.family.Ipv4Case;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.lsp.identifiers.address.family.Ipv4CaseBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.identifiers.tlv.lsp.identifiers.address.family.Ipv6Case;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.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.rev131222.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.rev131005.Tlv;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.Ipv4ExtendedTunnelId;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.LspId;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.TunnelId;
  31
  32 /**
  33  * Parser for {@link LspIdentifiers}
  34  */
  35 public final class Stateful07LSPIdentifierIpv4TlvParser implements TlvParser, TlvSerializer {
  36
  37     public static final int TYPE = 18;
  38
  39     private static final int EX_TUNNEL_ID4_F_LENGTH = 4;
  40
  41     private static final int V4_LENGTH = 16;
  42
  43     @Override
  44     public LspIdentifiers parseTlv(final ByteBuf buffer) throws PCEPDeserializerException {
  45         if (buffer == null) {
  46             return null;
  47         }
  48         if (buffer.readableBytes() != V4_LENGTH) {
  49             throw new IllegalArgumentException("Length " + buffer.readableBytes() + " does not match LSP Identifiers Ipv4 tlv length.");
  50         }
  51         final Ipv4Builder builder = new Ipv4Builder();
  52         builder.setIpv4TunnelSenderAddress(Ipv4Util.addressForBytes(ByteArray.readBytes(buffer, Ipv4Util.IP4_LENGTH)));
  53         final LspId lspId = new LspId((long) buffer.readUnsignedShort());
  54         final TunnelId tunnelId = new TunnelId(buffer.readUnsignedShort());
  55         builder.setIpv4ExtendedTunnelId(new Ipv4ExtendedTunnelId(Ipv4Util.addressForBytes(ByteArray.readBytes(buffer,
  56                 EX_TUNNEL_ID4_F_LENGTH))));
  57         builder.setIpv4TunnelEndpointAddress(Ipv4Util.addressForBytes(ByteArray.readBytes(buffer, Ipv4Util.IP4_LENGTH)));
  58         final AddressFamily afi = new Ipv4CaseBuilder().setIpv4(builder.build()).build();
  59         return new LspIdentifiersBuilder().setAddressFamily(afi).setLspId(lspId).setTunnelId(tunnelId).build();
  60     }
  61
  62     @Override
  63     public void serializeTlv(final Tlv tlv, final ByteBuf buffer) {
  64         Preconditions.checkArgument(tlv != null, "LspIdentifiersTlv is mandatory.");
  65         final LspIdentifiers lsp = (LspIdentifiers) tlv;
  66         final AddressFamily afi = lsp.getAddressFamily();
  67         final ByteBuf body = Unpooled.buffer();
  68         if (afi.getImplementedInterface().equals(Ipv6Case.class)) {
  69             new Stateful07LSPIdentifierIpv6TlvParser().serializeTlv(tlv, buffer);
  70         }
  71         final Ipv4 ipv4 = ((Ipv4Case) afi).getIpv4();
  72         body.writeBytes(Ipv4Util.bytesForAddress(ipv4.getIpv4TunnelSenderAddress()));
  73         body.writeShort(lsp.getLspId().getValue().shortValue());
  74         body.writeShort(lsp.getTunnelId().getValue().shortValue());
  75         body.writeBytes(Ipv4Util.bytesForAddress(ipv4.getIpv4ExtendedTunnelId()));
  76         body.writeBytes(Ipv4Util.bytesForAddress(ipv4.getIpv4TunnelEndpointAddress()));
  77         TlvUtil.formatTlv(TYPE, body, buffer);
  78     }
  79 }