bgp/extensions/evpn/src/main/java/org/opendaylight/protocol/bgp/evpn/impl/nlri/MACIpAdvRParser.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.nlri;
  10
  11 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.MPLS1_NID;
  12 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.MPLS2_NID;
  13 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.extractETI;
  14 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.extractIp;
  15 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.extractMAC;
  16 import static org.opendaylight.protocol.bgp.evpn.impl.nlri.NlriModelUtil.extractMplsLabel;
  17 import static org.opendaylight.protocol.util.MplsLabelUtil.byteBufForMplsLabel;
  18 import static org.opendaylight.protocol.util.MplsLabelUtil.mplsLabelForByteBuf;
  19
  20 import com.google.common.base.Preconditions;
  21 import io.netty.buffer.ByteBuf;
  22 import io.netty.buffer.Unpooled;
  23 import org.opendaylight.protocol.bgp.evpn.spi.pojo.SimpleEsiTypeRegistry;
  24 import org.opendaylight.protocol.util.ByteArray;
  25 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  26 import org.opendaylight.protocol.util.Ipv4Util;
  27 import org.opendaylight.protocol.util.Ipv6Util;
  28 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  29 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.IetfYangUtil;
  30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.MacAddress;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.NlriType;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.esi.Esi;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.ethernet.tag.id.EthernetTagId;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.ethernet.tag.id.EthernetTagIdBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.evpn.EvpnChoice;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.evpn.evpn.choice.MacIpAdvRouteCase;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.evpn.evpn.choice.MacIpAdvRouteCaseBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.mac.ip.adv.route.MacIpAdvRoute;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.evpn.rev180329.mac.ip.adv.route.MacIpAdvRouteBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.MplsLabel;
  41 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
  42 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
  43
  44 final class MACIpAdvRParser extends AbstractEvpnNlri {
  45     static final NodeIdentifier MAC_IP_ADV_ROUTE_NID = new NodeIdentifier(MacIpAdvRoute.QNAME);
  46     private static final int BITS_SIZE = 8;
  47
  48     @Override
  49     public EvpnChoice parseEvpn(final ByteBuf buffer) {
  50         final Esi esi = SimpleEsiTypeRegistry.getInstance().parseEsi(buffer.readSlice(ESI_SIZE));
  51         final EthernetTagId eti = new EthernetTagIdBuilder().setVlanId(buffer.readUnsignedInt()).build();
  52         buffer.skipBytes(1);
  53         final MacAddress mac = IetfYangUtil.INSTANCE.macAddressFor(ByteArray.readBytes(buffer, MAC_ADDRESS_LENGTH));
  54         final IpAddress ip = parseIp(buffer);
  55         final MplsLabel label1 = mplsLabelForByteBuf(buffer);
  56         MplsLabel label2;
  57         if (buffer.readableBytes() > 0) {
  58             label2 = mplsLabelForByteBuf(buffer);
  59         } else {
  60             label2 = null;
  61         }
  62         final MacIpAdvRouteBuilder builder = new MacIpAdvRouteBuilder().setEsi(esi).setEthernetTagId(eti)
  63                 .setMacAddress(mac).setIpAddress(ip)
  64             .setMplsLabel1(label1).setMplsLabel2(label2);
  65         return new MacIpAdvRouteCaseBuilder().setMacIpAdvRoute(builder.build()).build();
  66     }
  67
  68     @Override
  69     protected NlriType getType() {
  70         return NlriType.MacIpAdv;
  71     }
  72
  73     @Override
  74     public ByteBuf serializeBody(final EvpnChoice evpnChoice) {
  75         Preconditions.checkArgument(evpnChoice instanceof MacIpAdvRouteCase,
  76                 "Unknown evpn instance. Passed %s. Needed MacIpAdvRouteCase.", evpnChoice.getClass());
  77
  78         final ByteBuf body = Unpooled.buffer();
  79         final MacIpAdvRoute evpn = ((MacIpAdvRouteCase) evpnChoice).getMacIpAdvRoute();
  80         final Esi esi = evpn.getEsi();
  81         if (esi != null) {
  82             SimpleEsiTypeRegistry.getInstance().serializeEsi(evpn.getEsi(), body);
  83         }
  84         ByteBufWriteUtil.writeUnsignedInt(evpn.getEthernetTagId().getVlanId(), body);
  85
  86         final MacAddress mac = evpn.getMacAddress();
  87         body.writeByte(MAC_ADDRESS_LENGTH * BITS_SIZE);
  88         body.writeBytes(IetfYangUtil.INSTANCE.bytesFor(mac));
  89         final ByteBuf ipAddress = serializeIp(evpn.getIpAddress());
  90         Preconditions.checkArgument(ipAddress.readableBytes() > 0);
  91         body.writeBytes(ipAddress);
  92         final MplsLabel mpls1 = evpn.getMplsLabel1();
  93         if (mpls1 != null) {
  94             body.writeBytes(byteBufForMplsLabel(mpls1));
  95         }
  96         final MplsLabel mpls2 = evpn.getMplsLabel2();
  97         if (mpls2 != null) {
  98             body.writeBytes(byteBufForMplsLabel(mpls2));
  99         }
 100         return body;
 101     }
 102
 103     @Override
 104     public EvpnChoice serializeEvpnModel(final ContainerNode evpn) {
 105         final MacIpAdvRouteBuilder builder = serializeKeyModel(evpn);
 106         builder.setEsi(serializeEsi(evpn));
 107         builder.setMplsLabel1(extractMplsLabel(evpn, MPLS1_NID));
 108         builder.setMplsLabel2(extractMplsLabel(evpn, MPLS2_NID));
 109         return new MacIpAdvRouteCaseBuilder().setMacIpAdvRoute(builder.build()).build();
 110     }
 111
 112     @Override
 113     public EvpnChoice createRouteKey(final ContainerNode evpn) {
 114         return new MacIpAdvRouteCaseBuilder().setMacIpAdvRoute(serializeKeyModel(evpn).build()).build();
 115     }
 116
 117     private static MacIpAdvRouteBuilder serializeKeyModel(final ContainerNode evpn) {
 118         final MacIpAdvRouteBuilder builder = new MacIpAdvRouteBuilder();
 119         builder.setEthernetTagId(extractETI(evpn));
 120         builder.setMacAddress(extractMAC(evpn));
 121         builder.setIpAddress(extractIp(evpn));
 122         return builder;
 123     }
 124
 125     private static ByteBuf serializeIp(final IpAddress ipAddress) {
 126         final ByteBuf body = Unpooled.buffer();
 127         if (ipAddress != null) {
 128             if (ipAddress.getIpv4Address() != null) {
 129                 body.writeByte(Ipv4Util.IP4_BITS_LENGTH);
 130                 body.writeBytes(Ipv4Util.bytesForAddress(ipAddress.getIpv4Address()));
 131             } else if (ipAddress.getIpv6Address() != null) {
 132                 body.writeByte(Ipv6Util.IPV6_BITS_LENGTH);
 133                 body.writeBytes(Ipv6Util.bytesForAddress(ipAddress.getIpv6Address()));
 134             } else {
 135                 body.writeZero(ZERO_BYTE);
 136             }
 137         } else {
 138             body.writeZero(ZERO_BYTE);
 139         }
 140         return body;
 141     }
 142
 143     private static IpAddress parseIp(final ByteBuf buffer) {
 144         final int ipLength = buffer.readUnsignedByte();
 145         if (ipLength == Ipv6Util.IPV6_BITS_LENGTH) {
 146             return new IpAddress(Ipv6Util.addressForByteBuf(buffer));
 147         } else if (ipLength == Ipv4Util.IP4_BITS_LENGTH) {
 148             return new IpAddress(Ipv4Util.addressForByteBuf(buffer));
 149         }
 150         return null;
 151     }
 152 }