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.primitives.UnsignedBytes;
11 import io.netty.buffer.ByteBuf;
12 import io.netty.buffer.ByteBufUtil;
13 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;
27 * Parser for BGPNotification message.
29 public final class BGPNotificationMessageParser implements MessageParser, MessageSerializer {
31 public static final int TYPE = 3;
33 private static final Logger LOG = LoggerFactory.getLogger(BGPNotificationMessageParser.class);
35 private static final int ERROR_SIZE = 2;
38 * Serializes BGP Notification message.
40 * @param msg to be serialized
41 * @return BGP Notification message converted to byte array
44 public void serializeMessage(final Notification msg, ByteBuf bytes) {
46 throw new IllegalArgumentException("BGP Notification message cannot be null");
49 final Notify ntf = (Notify) msg;
50 LOG.trace("Started serializing Notification message: {}", ntf);
52 final byte[] msgBody = (ntf.getData() == null) ? new byte[ERROR_SIZE] : new byte[ERROR_SIZE + ntf.getData().length];
54 msgBody[0] = UnsignedBytes.checkedCast(ntf.getErrorCode());
56 msgBody[1] = UnsignedBytes.checkedCast(ntf.getErrorSubcode());
58 if (ntf.getData() != null) {
59 System.arraycopy(ntf.getData(), 0, msgBody, ERROR_SIZE, ntf.getData().length);
62 bytes.writeBytes(MessageUtil.formatMessage(TYPE, msgBody));
63 LOG.trace("Notification message serialized to: {}", ByteBufUtil.hexDump(bytes));
67 * Parses BGP Notification message to bytes.
69 * @param body byte array to be parsed
70 * @return BGPNotification message
71 * @throws BGPDocumentedException
74 public Notify parseMessageBody(final ByteBuf body, final int messageLength) throws BGPDocumentedException {
76 throw new IllegalArgumentException("Byte array cannot be null.");
78 LOG.trace("Started parsing of notification message: {}", Arrays.toString(ByteArray.getAllBytes(body)));
80 if (body.readableBytes() < ERROR_SIZE) {
81 throw BGPDocumentedException.badMessageLength("Notification message too small.", messageLength);
83 final int errorCode = UnsignedBytes.toInt(body.readByte());
84 final int errorSubcode = UnsignedBytes.toInt(body.readByte());
87 if (body.readableBytes() != 0) {
88 data = ByteArray.readAllBytes(body);
90 final NotifyBuilder builder = new NotifyBuilder().setErrorCode((short) errorCode).setErrorSubcode((short) errorSubcode);
92 builder.setData(data);
94 LOG.debug("BGP Notification message was parsed: err = {}, data = {}.", BGPError.forValue(errorCode, errorSubcode),
95 Arrays.toString(data));
96 return builder.build();