bgp/l3vpn/src/main/java/org/opendaylight/protocol/bgp/l3vpn/mcast/nlri/L3vpnMcastNlriSerializer.java

   1 /*
   2  * Copyright (c) 2018 AT&T Intellectual Property. 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.l3vpn.mcast.nlri;
  10
  11 import static org.opendaylight.protocol.util.Ipv6Util.IPV6_LENGTH;
  12
  13 import io.netty.buffer.ByteBuf;
  14 import io.netty.buffer.Unpooled;
  15 import java.util.ArrayList;
  16 import java.util.List;
  17 import org.opendaylight.bgp.concepts.RouteDistinguisherUtil;
  18 import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
  19 import org.opendaylight.protocol.util.Ipv4Util;
  20 import org.opendaylight.protocol.util.Ipv6Util;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.l3vpn.mcast.rev180417.l3vpn.mcast.destination.L3vpnMcastDestination;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.l3vpn.mcast.rev180417.l3vpn.mcast.destination.L3vpnMcastDestinationBuilder;
  24
  25 public final class L3vpnMcastNlriSerializer {
  26     private L3vpnMcastNlriSerializer() {
  27         throw new UnsupportedOperationException();
  28     }
  29
  30     static List<L3vpnMcastDestination> extractDest(final ByteBuf nlri, final boolean addPath) {
  31         List<L3vpnMcastDestination> dests = new ArrayList<>();
  32         while (nlri.isReadable()) {
  33             final L3vpnMcastDestinationBuilder builder = new L3vpnMcastDestinationBuilder();
  34             if (addPath) {
  35                 builder.setPathId(PathIdUtil.readPathId(nlri));
  36             }
  37             final int length = nlri.readUnsignedByte();
  38             builder.setRouteDistinguisher(RouteDistinguisherUtil.parseRouteDistinguisher(nlri));
  39             if (length == IPV6_LENGTH) {
  40                 builder.setPrefix(new IpPrefix(Ipv6Util.prefixForByteBuf(nlri)));
  41             } else {
  42                 builder.setPrefix(new IpPrefix(Ipv4Util.prefixForByteBuf(nlri)));
  43             }
  44             dests.add(builder.build());
  45         }
  46         return dests;
  47     }
  48
  49     public static void serializeNlri(final List<L3vpnMcastDestination> destinationList, final ByteBuf output) {
  50         for (final L3vpnMcastDestination dest : destinationList) {
  51             PathIdUtil.writePathId(dest.getPathId(), output);
  52             ByteBuf nlriOutput = Unpooled.buffer();
  53             RouteDistinguisherUtil.serializeRouteDistinquisher(dest.getRouteDistinguisher(), nlriOutput);
  54             final IpPrefix prefix = dest.getPrefix();
  55             if (prefix.getIpv4Prefix() != null) {
  56                 output.writeByte(Ipv4Util.IP4_BITS_LENGTH);
  57                 nlriOutput.writeBytes(Ipv4Util.bytesForPrefix(prefix.getIpv4Prefix()));
  58             } else {
  59                 output.writeByte(Ipv6Util.IPV6_BITS_LENGTH);
  60                 nlriOutput.writeBytes(Ipv6Util.bytesForPrefix(prefix.getIpv6Prefix()));
  61             }
  62             while (nlriOutput.readableBytes() % 8 != 0) {
  63                 nlriOutput.writeZero(1);
  64             }
  65             output.writeBytes(nlriOutput);
  66         }
  67     }
  68 }