bgp/evpn/src/main/java/org/opendaylight/protocol/bgp/evpn/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.evpn.impl.attributes.tunnel.identifier;
  10
  11 import static org.opendaylight.protocol.bgp.evpn.impl.attributes.tunnel.identifier.OpaqueUtil.serializeOpaqueList;
  12 import static org.opendaylight.protocol.bgp.evpn.impl.attributes.tunnel.identifier.PAddressPMulticastGroupUtil.parseIpAddress;
  13 import static org.opendaylight.protocol.bgp.evpn.impl.attributes.tunnel.identifier.PAddressPMulticastGroupUtil.serializeIpAddress;
  14 import static org.opendaylight.protocol.bgp.evpn.impl.attributes.tunnel.identifier.TunnelIdentifierHandler.NO_TUNNEL_INFORMATION_PRESENT;
  15
  16 import com.google.common.base.Preconditions;
  17 import io.netty.buffer.ByteBuf;
  18 import io.netty.buffer.ByteBufUtil;
  19 import io.netty.buffer.Unpooled;
  20 import org.opendaylight.protocol.bgp.parser.spi.AddressFamilyRegistry;
  21 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  22 import org.opendaylight.protocol.util.Ipv4Util;
  23 import org.opendaylight.protocol.util.Ipv6Util;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev160812.pmsi.tunnel.pmsi.tunnel.TunnelIdentifier;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev160812.pmsi.tunnel.pmsi.tunnel.tunnel.identifier.MldpP2mpLsp;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev160812.pmsi.tunnel.pmsi.tunnel.tunnel.identifier.MldpP2mpLspBuilder;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 final class MldpP2mpLspParser implements TunnelIdentifierSerializer, TunnelIdentifierParser {
  33     private static final Logger LOG = LoggerFactory.getLogger(MldpP2mpLspParser.class);
  34     private static final short P2MP_TYPE = 6;
  35     private static final int RESERVED = 1;
  36     private final AddressFamilyRegistry addressFamilyRegistry;
  37
  38     MldpP2mpLspParser(final AddressFamilyRegistry addressFamilyRegistry) {
  39         this.addressFamilyRegistry = addressFamilyRegistry;
  40     }
  41
  42     @Override
  43     public int serialize(final TunnelIdentifier tunnelIdentifier, final ByteBuf buffer) {
  44         Preconditions.checkArgument(tunnelIdentifier instanceof MldpP2mpLsp,
  45                 "The tunnelIdentifier %s is not RsvpTeP2mpLps type.", tunnelIdentifier);
  46         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev160812.pmsi.tunnel.pmsi
  47                 .tunnel.tunnel.identifier.mldp.p2mp.lsp.MldpP2mpLsp mldpP2mpLsp =
  48                 ((MldpP2mpLsp) tunnelIdentifier).getMldpP2mpLsp();
  49
  50         final ByteBuf opaqueValues = Unpooled.buffer();
  51         final int addressFamily = getAddressFamilyValue(mldpP2mpLsp.getAddressFamily());
  52
  53         if (!serializeOpaqueList(mldpP2mpLsp.getOpaqueValue(), opaqueValues) || addressFamily == 0) {
  54             return NO_TUNNEL_INFORMATION_PRESENT;
  55         }
  56         final IpAddress rootNode = mldpP2mpLsp.getRootNodeAddress();
  57         ByteBufWriteUtil.writeUnsignedByte(P2MP_TYPE, buffer);
  58         ByteBufWriteUtil.writeUnsignedShort(addressFamily, buffer);
  59         ByteBufWriteUtil.writeUnsignedByte(getAdressFamilyLength(rootNode), buffer);
  60         serializeIpAddress(rootNode, buffer);
  61
  62         ByteBufWriteUtil.writeUnsignedShort(opaqueValues.readableBytes(), buffer);
  63         buffer.writeBytes(opaqueValues);
  64         return TunnelType.MLDP_P2MP_LSP.getIntValue();
  65     }
  66
  67     private static short getAdressFamilyLength(final IpAddress ipAddress) {
  68         if (ipAddress.getIpv4Address() == null) {
  69             return Ipv6Util.IPV6_LENGTH;
  70         }
  71         return Ipv4Util.IP4_LENGTH;
  72     }
  73
  74     private int getAddressFamilyValue(final Class<? extends AddressFamily> addressFamily) {
  75         final Integer type = this.addressFamilyRegistry.numberForClass(addressFamily);
  76         if (type == null) {
  77             return 0;
  78         }
  79         return type;
  80     }
  81
  82     @Override
  83     public TunnelIdentifier parse(final ByteBuf buffer) {
  84         final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev160812.pmsi.tunnel.pmsi
  85                 .tunnel.tunnel.identifier.mldp.p2mp.lsp.MldpP2mpLspBuilder mldpP2mpLsp =
  86                 new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pmsi.tunnel.rev160812.pmsi.tunnel
  87                         .pmsi.tunnel.tunnel.identifier.mldp.p2mp.lsp.MldpP2mpLspBuilder();
  88         buffer.skipBytes(RESERVED);
  89         final Class<? extends AddressFamily> addressFamily = this.addressFamilyRegistry
  90                 .classForFamily(buffer.readUnsignedShort());
  91         if (addressFamily == null) {
  92             LOG.debug("Skipping serialization of TunnelIdentifier {}, address family type  supported",
  93                     ByteBufUtil.hexDump(buffer));
  94             return null;
  95         }
  96         mldpP2mpLsp.setAddressFamily(addressFamily);
  97         final short rootNodeLength = buffer.readUnsignedByte();
  98         mldpP2mpLsp.setRootNodeAddress(parseIpAddress(rootNodeLength, buffer.readBytes(rootNodeLength)));
  99         final int opaqueValueLength = buffer.readUnsignedShort();
 100         mldpP2mpLsp.setOpaqueValue(OpaqueUtil.parseOpaqueList(buffer.readBytes(opaqueValueLength)));
 101         return new MldpP2mpLspBuilder().setMldpP2mpLsp(mldpP2mpLsp.build()).build();
 102     }
 103 }