bgp/extensions/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 package org.opendaylight.protocol.bgp.l3vpn.mcast.nlri;
   9
  10 import io.netty.buffer.ByteBuf;
  11 import io.netty.buffer.Unpooled;
  12 import java.util.ArrayList;
  13 import java.util.List;
  14 import org.opendaylight.bgp.concepts.RouteDistinguisherUtil;
  15 import org.opendaylight.protocol.bgp.parser.spi.PathIdUtil;
  16 import org.opendaylight.protocol.util.Ipv4Util;
  17 import org.opendaylight.protocol.util.Ipv6Util;
  18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.l3vpn.mcast.rev180417.l3vpn.mcast.destination.L3vpnMcastDestination;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.l3vpn.mcast.rev180417.l3vpn.mcast.destination.L3vpnMcastDestinationBuilder;
  21
  22 public final class L3vpnMcastNlriSerializer {
  23     private L3vpnMcastNlriSerializer() {
  24         // Hidden on purpose
  25     }
  26
  27     static List<L3vpnMcastDestination> extractDest(final ByteBuf nlri, final boolean addPath) {
  28         List<L3vpnMcastDestination> dests = new ArrayList<>();
  29         while (nlri.isReadable()) {
  30             final L3vpnMcastDestinationBuilder builder = new L3vpnMcastDestinationBuilder();
  31             if (addPath) {
  32                 builder.setPathId(PathIdUtil.readPathId(nlri));
  33             }
  34             final int length = nlri.readUnsignedByte();
  35
  36             final int initialLength = nlri.readableBytes();
  37             builder.setRouteDistinguisher(RouteDistinguisherUtil.parseRouteDistinguisher(nlri));
  38             if (length == Ipv6Util.IPV6_BITS_LENGTH) {
  39                 builder.setPrefix(new IpPrefix(Ipv6Util.prefixForByteBuf(nlri)));
  40             } else {
  41                 builder.setPrefix(new IpPrefix(Ipv4Util.prefixForByteBuf(nlri)));
  42             }
  43             dests.add(builder.build());
  44             int readed = initialLength - nlri.readableBytes();
  45             while (readed % 8 != 0) {
  46                 nlri.readByte();
  47                 readed = initialLength - nlri.readableBytes();
  48             }
  49         }
  50         return dests;
  51     }
  52
  53     public static void serializeNlri(final List<L3vpnMcastDestination> destinationList, final ByteBuf output) {
  54         for (final L3vpnMcastDestination dest : destinationList) {
  55             PathIdUtil.writePathId(dest.getPathId(), output);
  56             ByteBuf prefixBuf = Unpooled.buffer();
  57             RouteDistinguisherUtil.serializeRouteDistinquisher(dest.getRouteDistinguisher(), prefixBuf);
  58             final IpPrefix prefix = dest.getPrefix();
  59             if (prefix.getIpv4Prefix() != null) {
  60                 output.writeByte(Ipv4Util.IP4_BITS_LENGTH);
  61                 Ipv4Util.writeMinimalPrefix(prefix.getIpv4Prefix(), prefixBuf);
  62             } else {
  63                 output.writeByte(Ipv6Util.IPV6_BITS_LENGTH);
  64                 Ipv6Util.writeMinimalPrefix(prefix.getIpv6Prefix(), prefixBuf);
  65             }
  66             // FIXME: remove this funky loop
  67             while (prefixBuf.readableBytes() % 8 != 0) {
  68                 prefixBuf.writeByte(0);
  69             }
  70             output.writeBytes(prefixBuf);
  71         }
  72     }
  73 }