bgp/extensions/mvpn/src/main/java/org/opendaylight/protocol/bgp/mvpn/impl/attributes/tunnel/identifier/MldpP2mpLspParser.java

   1 /*
   2  * Copyright (c) 2016 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.bgp.mvpn.impl.attributes.tunnel.identifier;
  10
  11 import static org.opendaylight.protocol.bgp.mvpn.impl.attributes.OpaqueUtil.serializeOpaqueList;
  12 import static org.opendaylight.protocol.bgp.mvpn.impl.attributes.tunnel.identifier.PAddressPMulticastGroupUtil.parseIpAddress;
  13 import static org.opendaylight.protocol.bgp.mvpn.impl.attributes.tunnel.identifier.PAddressPMulticastGroupUtil.serializeIpAddress;
  14 import static org.opendaylight.protocol.bgp.mvpn.spi.pojo.attributes.tunnel.identifier.SimpleTunnelIdentifierRegistry.NO_TUNNEL_INFORMATION_PRESENT;
  15
  16 import io.netty.buffer.ByteBuf;
  17 import io.netty.buffer.ByteBufUtil;
  18 import io.netty.buffer.Unpooled;
  19 import org.opendaylight.protocol.bgp.mvpn.impl.attributes.OpaqueUtil;
  20 import org.opendaylight.protocol.bgp.mvpn.spi.attributes.tunnel.identifier.AbstractTunnelIdentifier;
  21 import org.opendaylight.protocol.bgp.parser.spi.AddressFamilyRegistry;
  22 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  23 import org.opendaylight.protocol.util.Ipv4Util;
  24 import org.opendaylight.protocol.util.Ipv6Util;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.AddressFamily;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev180329.PmsiTunnelType;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev180329.pmsi.tunnel.pmsi.tunnel.TunnelIdentifier;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev180329.pmsi.tunnel.pmsi.tunnel.tunnel.identifier.MldpP2mpLsp;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev180329.pmsi.tunnel.pmsi.tunnel.tunnel.identifier.MldpP2mpLspBuilder;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 public final class MldpP2mpLspParser extends AbstractTunnelIdentifier<MldpP2mpLsp> {
  35     private static final Logger LOG = LoggerFactory.getLogger(MldpP2mpLspParser.class);
  36     private static final short P2MP_TYPE = 6;
  37     private static final int RESERVED = 1;
  38     private final AddressFamilyRegistry addressFamilyRegistry;
  39
  40     public MldpP2mpLspParser(final AddressFamilyRegistry addressFamilyRegistry) {
  41         this.addressFamilyRegistry = addressFamilyRegistry;
  42     }
  43
  44     @Override
  45     public int serialize(final MldpP2mpLsp tunnelIdentifier, final ByteBuf buffer) {
  46         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev180329.pmsi.tunnel.pmsi
  47                 .tunnel.tunnel.identifier.mldp.p2mp.lsp.MldpP2mpLsp mldpP2mpLsp = tunnelIdentifier.getMldpP2mpLsp();
  48
  49         final ByteBuf opaqueValues = Unpooled.buffer();
  50         final int addressFamily = getAddressFamilyValue(mldpP2mpLsp.getAddressFamily());
  51
  52         if (!serializeOpaqueList(mldpP2mpLsp.getOpaqueValue(), opaqueValues) || addressFamily == 0) {
  53             return NO_TUNNEL_INFORMATION_PRESENT;
  54         }
  55         final IpAddress rootNode = mldpP2mpLsp.getRootNodeAddress();
  56         ByteBufWriteUtil.writeUnsignedByte(P2MP_TYPE, buffer);
  57         ByteBufWriteUtil.writeUnsignedShort(addressFamily, buffer);
  58         ByteBufWriteUtil.writeUnsignedByte(getAdressFamilyLength(rootNode), buffer);
  59         serializeIpAddress(rootNode, buffer);
  60
  61         ByteBufWriteUtil.writeUnsignedShort(opaqueValues.readableBytes(), buffer);
  62         buffer.writeBytes(opaqueValues);
  63         return getType();
  64     }
  65
  66     @Override
  67     public Class<? extends TunnelIdentifier> getClazz() {
  68         return MldpP2mpLsp.class;
  69     }
  70
  71     @Override
  72     public int getType() {
  73         return PmsiTunnelType.MldpP2mpLsp.getIntValue();
  74     }
  75
  76     private static short getAdressFamilyLength(final IpAddress ipAddress) {
  77         if (ipAddress.getIpv4Address() == null) {
  78             return Ipv6Util.IPV6_LENGTH;
  79         }
  80         return Ipv4Util.IP4_LENGTH;
  81     }
  82
  83     private int getAddressFamilyValue(final Class<? extends AddressFamily> addressFamily) {
  84         final Integer type = this.addressFamilyRegistry.numberForClass(addressFamily);
  85         if (type == null) {
  86             return 0;
  87         }
  88         return type;
  89     }
  90
  91     @Override
  92     public MldpP2mpLsp parse(final ByteBuf buffer) {
  93         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev180329.pmsi.tunnel.pmsi
  94                 .tunnel.tunnel.identifier.mldp.p2mp.lsp.MldpP2mpLspBuilder mldpP2mpLsp =
  95                 new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev180329.pmsi.tunnel
  96                         .pmsi.tunnel.tunnel.identifier.mldp.p2mp.lsp.MldpP2mpLspBuilder();
  97         buffer.skipBytes(RESERVED);
  98         final Class<? extends AddressFamily> addressFamily = this.addressFamilyRegistry
  99                 .classForFamily(buffer.readUnsignedShort());
 100         if (addressFamily == null) {
 101             LOG.debug("Skipping serialization of TunnelIdentifier {}, address family type  supported",
 102                     ByteBufUtil.hexDump(buffer));
 103             return null;
 104         }
 105         mldpP2mpLsp.setAddressFamily(addressFamily);
 106         final short rootNodeLength = buffer.readUnsignedByte();
 107         mldpP2mpLsp.setRootNodeAddress(parseIpAddress(rootNodeLength, buffer.readBytes(rootNodeLength)));
 108         final int opaqueValueLength = buffer.readUnsignedShort();
 109         mldpP2mpLsp.setOpaqueValue(OpaqueUtil.parseOpaqueList(buffer.readBytes(opaqueValueLength)));
 110         return new MldpP2mpLspBuilder().setMldpP2mpLsp(mldpP2mpLsp.build()).build();
 111     }
 112 }