2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.protocol.bgp.parser.impl.message;
10 import com.google.common.base.Preconditions;
11 import io.netty.buffer.ByteBuf;
12 import io.netty.buffer.ByteBufUtil;
13 import io.netty.buffer.Unpooled;
14 import java.util.Arrays;
15 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
16 import org.opendaylight.protocol.bgp.parser.BGPError;
17 import org.opendaylight.protocol.bgp.parser.spi.MessageParser;
18 import org.opendaylight.protocol.bgp.parser.spi.MessageSerializer;
19 import org.opendaylight.protocol.bgp.parser.spi.MessageUtil;
20 import org.opendaylight.protocol.util.ByteArray;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.Notify;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.NotifyBuilder;
23 import org.opendaylight.yangtools.yang.binding.Notification;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
28 * Parser for BGPNotification message.
30 public final class BGPNotificationMessageParser implements MessageParser, MessageSerializer {
32 private static final Logger LOG = LoggerFactory.getLogger(BGPNotificationMessageParser.class);
34 public static final int TYPE = 3;
36 private static final int ERROR_SIZE = 2;
39 * Serializes BGP Notification message.
41 * @param msg to be serialized
42 * @param bytes ByteBuf where the message will be serialized
45 public void serializeMessage(final Notification msg, final ByteBuf bytes) {
46 Preconditions.checkArgument(msg instanceof Notify, "Message needs to be of type Notify");
47 final Notify ntf = (Notify) msg;
49 final ByteBuf msgBody = Unpooled.buffer();
50 msgBody.writeByte(ntf.getErrorCode());
51 msgBody.writeByte(ntf.getErrorSubcode());
52 final byte[] data = ntf.getData();
54 msgBody.writeBytes(data);
56 LOG.trace("Notification message serialized to: {}", ByteBufUtil.hexDump(msgBody));
57 MessageUtil.formatMessage(TYPE, msgBody, bytes);
61 * Parses BGP Notification message to bytes.
63 * @param body ByteBuf to be parsed
64 * @param messageLength the length of the message
65 * @return {@link Notify} which represents BGP notification message
66 * @throws BGPDocumentedException if parsing goes wrong
69 public Notify parseMessageBody(final ByteBuf body, final int messageLength) throws BGPDocumentedException {
70 Preconditions.checkArgument(body != null, "Buffer cannot be null.");
71 if (body.readableBytes() < ERROR_SIZE) {
72 throw BGPDocumentedException.badMessageLength("Notification message too small.", messageLength);
74 final int errorCode = body.readUnsignedByte();
75 final int errorSubcode = body.readUnsignedByte();
76 final NotifyBuilder builder = new NotifyBuilder().setErrorCode((short) errorCode).setErrorSubcode((short) errorSubcode);
77 if (body.isReadable()) {
78 builder.setData(ByteArray.readAllBytes(body));
80 LOG.debug("BGP Notification message was parsed: err = {}, data = {}.", BGPError.forValue(errorCode, errorSubcode),
81 Arrays.toString(builder.getData()));
82 return builder.build();