bmp/bmp-spi/src/main/java/org/opendaylight/protocol/bmp/spi/parser/AbstractBmpPerPeerMessageParser.java

   1 /*
   2  * Copyright (c) 2015 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.bmp.spi.parser;
  10
  11 import static java.util.Objects.requireNonNull;
  12
  13 import com.google.common.base.Preconditions;
  14 import io.netty.buffer.ByteBuf;
  15 import org.opendaylight.bgp.concepts.RouteDistinguisherUtil;
  16 import org.opendaylight.protocol.bgp.parser.spi.MessageRegistry;
  17 import org.opendaylight.protocol.util.BitArray;
  18 import org.opendaylight.protocol.util.ByteArray;
  19 import org.opendaylight.protocol.util.ByteBufUtils;
  20 import org.opendaylight.protocol.util.ByteBufWriteUtil;
  21 import org.opendaylight.protocol.util.Ipv4Util;
  22 import org.opendaylight.protocol.util.Ipv6Util;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.AsNumber;
  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.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Timestamp;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev180329.AdjRibInType;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev180329.Peer.PeerDistinguisher;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev180329.PeerType;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev180329.peer.header.PeerHeader;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev180329.peer.header.PeerHeaderBuilder;
  31 import org.opendaylight.yangtools.concepts.Builder;
  32 import org.opendaylight.yangtools.yang.binding.Notification;
  33
  34 public abstract class AbstractBmpPerPeerMessageParser<T extends Builder<?>> extends AbstractBmpMessageWithTlvParser<T> {
  35
  36     private static final int L_FLAG_POS = 1;
  37     private static final int V_FLAG_POS = 0;
  38     private static final int FLAGS_SIZE = 8;
  39     private static final int PEER_DISTINGUISHER_SIZE = 8;
  40     private static final int PER_PEER_HEADER_SIZE = 32;
  41
  42     private final MessageRegistry bgpMssageRegistry;
  43
  44     public AbstractBmpPerPeerMessageParser(final MessageRegistry bgpMssageRegistry) {
  45         this(bgpMssageRegistry, null);
  46     }
  47
  48     public AbstractBmpPerPeerMessageParser(final MessageRegistry bgpMssageRegistry, final BmpTlvRegistry tlvRegistry) {
  49         super(tlvRegistry);
  50         this.bgpMssageRegistry = requireNonNull(bgpMssageRegistry);
  51     }
  52
  53     @Override
  54     public void serializeMessageBody(final Notification message, final ByteBuf buffer) {
  55         if (message
  56                 instanceof org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev180329
  57                 .PeerHeader) {
  58             final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp.message.rev180329.PeerHeader
  59                     messageWithPerPeerHeader = (org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bmp
  60                     .message.rev180329.PeerHeader) message;
  61             serializePerPeerHeader(messageWithPerPeerHeader.getPeerHeader(), buffer);
  62         }
  63     }
  64
  65     protected static PeerHeader parsePerPeerHeader(final ByteBuf bytes) {
  66         Preconditions.checkArgument(bytes.readableBytes() >= PER_PEER_HEADER_SIZE);
  67         final PeerHeaderBuilder phBuilder = new PeerHeaderBuilder();
  68         final PeerType peerType = PeerType.forValue(bytes.readByte());
  69         phBuilder.setType(peerType);
  70         final BitArray flags = BitArray.valueOf(bytes, FLAGS_SIZE);
  71         phBuilder.setAdjRibInType(AdjRibInType.forValue(flags.get(L_FLAG_POS) ? 1 : 0));
  72         phBuilder.setIpv4(!flags.get(V_FLAG_POS));
  73         switch (peerType) {
  74             case L3vpn:
  75                 phBuilder.setPeerDistinguisher(
  76                         new PeerDistinguisher(RouteDistinguisherUtil.parseRouteDistinguisher(bytes)));
  77                 break;
  78             case Local:
  79                 phBuilder.setPeerDistinguisher(
  80                         new PeerDistinguisher(ByteArray.readBytes(bytes, PEER_DISTINGUISHER_SIZE)));
  81                 break;
  82             case Global:
  83             default:
  84                 bytes.skipBytes(PEER_DISTINGUISHER_SIZE);
  85                 break;
  86         }
  87         if (phBuilder.isIpv4()) {
  88             bytes.skipBytes(Ipv6Util.IPV6_LENGTH - Ipv4Util.IP4_LENGTH);
  89             phBuilder.setAddress(new IpAddress(Ipv4Util.addressForByteBuf(bytes)));
  90         } else {
  91             phBuilder.setAddress(new IpAddress(Ipv6Util.addressForByteBuf(bytes)));
  92         }
  93         phBuilder.setAs(new AsNumber(ByteBufUtils.readUint32(bytes)));
  94         phBuilder.setBgpId(Ipv4Util.addressForByteBuf(bytes));
  95         phBuilder.setTimestampSec(new Timestamp(ByteBufUtils.readUint32(bytes)));
  96         phBuilder.setTimestampMicro(new Timestamp(ByteBufUtils.readUint32(bytes)));
  97         return phBuilder.build();
  98     }
  99
 100     protected void serializePerPeerHeader(final PeerHeader peerHeader, final ByteBuf output) {
 101         Preconditions.checkArgument(peerHeader != null, "Per-peer header cannot be null.");
 102         final PeerType peerType = peerHeader.getType();
 103         output.writeByte(peerType.getIntValue());
 104         final BitArray flags = new BitArray(FLAGS_SIZE);
 105         flags.set(L_FLAG_POS, peerHeader.getAdjRibInType().getIntValue() != 0);
 106         flags.set(V_FLAG_POS, !peerHeader.isIpv4());
 107         flags.toByteBuf(output);
 108         final PeerDistinguisher peerDistinguisher = peerHeader.getPeerDistinguisher();
 109         switch (peerType) {
 110             case L3vpn:
 111                 RouteDistinguisherUtil.serializeRouteDistinquisher(peerDistinguisher.getRouteDistinguisher(), output);
 112                 break;
 113             case Local:
 114                 output.writeBytes(peerDistinguisher.getBinary());
 115                 break;
 116             case Global:
 117             default:
 118                 output.writeZero(PEER_DISTINGUISHER_SIZE);
 119                 break;
 120         }
 121         if (peerHeader.isIpv4()) {
 122             output.writeZero(Ipv6Util.IPV6_LENGTH - Ipv4Util.IP4_LENGTH);
 123             ByteBufWriteUtil.writeIpv4Address(peerHeader.getAddress().getIpv4Address(), output);
 124         } else {
 125             ByteBufWriteUtil.writeIpv6Address(peerHeader.getAddress().getIpv6Address(), output);
 126         }
 127         ByteBufWriteUtil.writeUnsignedInt(peerHeader.getAs().getValue(), output);
 128         ByteBufWriteUtil.writeIpv4Address(peerHeader.getBgpId(), output);
 129         if (peerHeader.getTimestampSec() != null) {
 130             ByteBufWriteUtil.writeUnsignedInt(peerHeader.getTimestampSec().getValue(), output);
 131         } else {
 132             output.writeInt(0);
 133         }
 134         if (peerHeader.getTimestampMicro() != null) {
 135             ByteBufWriteUtil.writeUnsignedInt(peerHeader.getTimestampMicro().getValue(), output);
 136         } else {
 137             output.writeInt(0);
 138         }
 139     }
 140
 141     protected final MessageRegistry getBgpMessageRegistry() {
 142         return this.bgpMssageRegistry;
 143     }
 144 }