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 io.netty.buffer.ByteBuf;
12 import java.util.Arrays;
14 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
15 import org.opendaylight.protocol.bgp.parser.BGPError;
16 import org.opendaylight.protocol.bgp.parser.spi.MessageParser;
17 import org.opendaylight.protocol.bgp.parser.spi.MessageSerializer;
18 import org.opendaylight.protocol.bgp.parser.spi.MessageUtil;
19 import org.opendaylight.protocol.util.ByteArray;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.Notify;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.NotifyBuilder;
22 import org.opendaylight.yangtools.yang.binding.Notification;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
26 import com.google.common.primitives.UnsignedBytes;
29 * Parser for BGPNotification message.
31 public final class BGPNotificationMessageParser implements MessageParser, MessageSerializer {
32 public static final int TYPE = 3;
34 private static final Logger LOG = LoggerFactory.getLogger(BGPNotificationMessageParser.class);
36 private static final int ERROR_SIZE = 2;
39 * Serializes BGP Notification message.
41 * @param msg to be serialized
42 * @return BGP Notification message converted to byte array
45 public byte[] serializeMessage(final Notification msg) {
47 throw new IllegalArgumentException("BGP Notification message cannot be null");
50 final Notify ntf = (Notify) msg;
51 LOG.trace("Started serializing Notification message: {}", ntf);
53 final byte[] msgBody = (ntf.getData() == null) ? new byte[ERROR_SIZE] : new byte[ERROR_SIZE + ntf.getData().length];
55 msgBody[0] = UnsignedBytes.checkedCast(ntf.getErrorCode());
57 msgBody[1] = UnsignedBytes.checkedCast(ntf.getErrorSubcode());
59 if (ntf.getData() != null) {
60 System.arraycopy(ntf.getData(), 0, msgBody, ERROR_SIZE, ntf.getData().length);
63 final byte[] ret = MessageUtil.formatMessage(TYPE, msgBody);
64 LOG.trace("Notification message serialized to: {}", Arrays.toString(ret));
69 * Parses BGP Notification message to bytes.
71 * @param body byte array to be parsed
72 * @return BGPNotification message
73 * @throws BGPDocumentedException
76 public Notify parseMessageBody(final ByteBuf body, final int messageLength) throws BGPDocumentedException {
78 throw new IllegalArgumentException("Byte array cannot be null.");
80 LOG.trace("Started parsing of notification message: {}", Arrays.toString(ByteArray.getAllBytes(body)));
82 if (body.readableBytes() < ERROR_SIZE) {
83 throw BGPDocumentedException.badMessageLength("Notification message too small.", messageLength);
85 final int errorCode = UnsignedBytes.toInt(body.readByte());
86 final int errorSubcode = UnsignedBytes.toInt(body.readByte());
89 if (body.readableBytes() != 0) {
90 data = ByteArray.readAllBytes(body);
92 LOG.trace("Notification message was parsed: err = {}, data = {}.", BGPError.forValue(errorCode, errorSubcode),
93 Arrays.toString(data));
94 final NotifyBuilder builder = new NotifyBuilder().setErrorCode((short) errorCode).setErrorSubcode((short) errorSubcode);
96 builder.setData(data);
98 return builder.build();