Example usage for io.netty.buffer ByteBuf resetReaderIndex

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf resetReaderIndex.

Prototype

public abstract ByteBuf resetReaderIndex();

Source Link

Document

Repositions the current readerIndex to the marked readerIndex in this buffer.

Usage

From source file:org.apache.qpid.jms.provider.amqp.message.AmqpCodec.java

License:Apache License

/**
 * Given an encoded AMQP Section, decode the value previously written there.
 *
 * @param encoded//from w w  w .  j  a  v  a  2  s . c  o  m
 *      the AMQP Section value to decode.
 *
 * @return a Section object read from its encoded form.
 */
public static Section decode(ByteBuf encoded) {
    if (encoded == null || !encoded.isReadable()) {
        return null;
    }

    DecoderImpl decoder = TLS_CODEC.get().decoder;
    decoder.setByteBuffer(encoded.nioBuffer());
    Section result = (Section) decoder.readObject();
    decoder.setByteBuffer(null);
    encoded.resetReaderIndex();

    return result;
}

---

From source file:org.apache.qpid.jms.provider.amqp.message.AmqpCodec.java

License:Apache License

/**
 * Create a new JmsMessage and underlying JmsMessageFacade that represents the proper
 * message type for the incoming AMQP message.
 *
 * @param consumer/*from  w ww  .  j  av a 2 s  . c o m*/
 *        The AmqpConsumer instance that will be linked to the decoded message.
 * @param messageBytes
 *        The the raw bytes that compose the incoming message. (Read-Only)
 *
 * @return a AmqpJmsMessageFacade instance decoded from the message bytes.
 *
 * @throws IOException if an error occurs while creating the message objects.
 */
public static AmqpJmsMessageFacade decodeMessage(AmqpConsumer consumer, ByteBuf messageBytes)
        throws IOException {

    DecoderImpl decoder = getDecoder();
    ByteBuffer buffer = messageBytes.nioBuffer();
    decoder.setByteBuffer(buffer);

    Header header = null;
    DeliveryAnnotations deliveryAnnotations = null;
    MessageAnnotations messageAnnotations = null;
    Properties properties = null;
    ApplicationProperties applicationProperties = null;
    Section body = null;
    Footer footer = null;
    Section section = null;

    if (buffer.hasRemaining()) {
        section = (Section) decoder.readObject();
    }

    if (section instanceof Header) {
        header = (Header) section;
        if (buffer.hasRemaining()) {
            section = (Section) decoder.readObject();
        } else {
            section = null;
        }

    }
    if (section instanceof DeliveryAnnotations) {
        deliveryAnnotations = (DeliveryAnnotations) section;

        if (buffer.hasRemaining()) {
            section = (Section) decoder.readObject();
        } else {
            section = null;
        }

    }
    if (section instanceof MessageAnnotations) {
        messageAnnotations = (MessageAnnotations) section;

        if (buffer.hasRemaining()) {
            section = (Section) decoder.readObject();
        } else {
            section = null;
        }

    }
    if (section instanceof Properties) {
        properties = (Properties) section;

        if (buffer.hasRemaining()) {
            section = (Section) decoder.readObject();
        } else {
            section = null;
        }

    }
    if (section instanceof ApplicationProperties) {
        applicationProperties = (ApplicationProperties) section;

        if (buffer.hasRemaining()) {
            section = (Section) decoder.readObject();
        } else {
            section = null;
        }

    }
    if (section != null && !(section instanceof Footer)) {
        body = section;

        if (buffer.hasRemaining()) {
            section = (Section) decoder.readObject();
        } else {
            section = null;
        }

    }
    if (section instanceof Footer) {
        footer = (Footer) section;
    }

    decoder.setByteBuffer(null);
    messageBytes.resetReaderIndex();

    // First we try the easy way, if the annotation is there we don't have to work hard.
    AmqpJmsMessageFacade result = createFromMsgAnnotation(messageAnnotations);
    if (result == null) {
        // Next, match specific section structures and content types
        result = createWithoutAnnotation(body, properties);
    }

    if (result != null) {
        result.setHeader(header);
        result.setDeliveryAnnotations(deliveryAnnotations);
        result.setMessageAnnotations(messageAnnotations);
        result.setProperties(properties);
        result.setApplicationProperties(applicationProperties);
        result.setBody(body);
        result.setFooter(footer);
        result.initialize(consumer);

        return result;
    }

    throw new IOException("Could not create a JMS message from incoming message");
}

---

From source file:org.apache.spark.sql.hive.thriftserver.rsc.KryoMessageCodec.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() < 4) {
        return;/*from www  .  j a  v  a 2s.  co  m*/
    }

    in.markReaderIndex();
    int msgSize = in.readInt();
    checkSize(msgSize);

    if (in.readableBytes() < msgSize) {
        // Incomplete message in buffer.
        in.resetReaderIndex();
        return;
    }

    try {
        ByteBuffer nioBuffer = maybeDecrypt(in.nioBuffer(in.readerIndex(), msgSize));
        Object msg = serializer.deserialize(nioBuffer);
        LOG.info("Decoded message of type {} ({} bytes)", msg != null ? msg.getClass().getName() : msg,
                msgSize);
        out.add(msg);
    } catch (Exception e) {
        Throwable throwable = e;

        while (throwable != null) {
            LOG.info("tlitest cause: " + throwable.getCause());
            LOG.info("tlitest message: " + throwable.getMessage());

            StringBuilder builder = new StringBuilder();

            for (StackTraceElement elem : throwable.getStackTrace()) {
                builder.append(elem);
                builder.append("\n");
            }
            LOG.info(builder.toString());
            throwable = throwable.getCause();
        }

        throw e;
    } finally {
        in.skipBytes(msgSize);
    }
}

---

From source file:org.beaconmc.network.socket.pipeline.PacketFraming.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    in.markReaderIndex();//from w  ww.  ja  v  a2  s  . c  om
    if (!readableVarInt(in)) {
        return;
    }
    int length = readVarInt(in);
    if (in.readableBytes() < length) {
        in.resetReaderIndex();
        return;
    }
    ByteBuf buf = ctx.alloc().buffer(length);
    in.readBytes(buf, length);
    out.add(buf);
}

---

From source file:org.beaconmc.network.socket.pipeline.PacketLegacy.java

License:Open Source License

@Override
protected void messageReceived(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf) throws Exception {

    byteBuf.markReaderIndex();/*from   ww  w . j a v  a  2 s  .c om*/
    boolean repliedPing = true;

    try {
        short packetId = byteBuf.readUnsignedByte();
        if (packetId == 254) {
            int length = byteBuf.readableBytes();
            AsyncServerPingEvent asyncServerPingEvent = EventFactory
                    .callAsyncServerPingEvent(this.server.createServerPing());
            if (asyncServerPingEvent.getPing() != null) {
                switch (length) {
                case 0:
                    this.sendPingAndClose(channelHandlerContext,
                            this.toArray(String.format("%s%d%d",
                                    asyncServerPingEvent.getPing().getDescription().getText(),
                                    asyncServerPingEvent.getPing().getPlayers().getOnline(),
                                    asyncServerPingEvent.getPing().getPlayers().getMax())));
                    break;
                case 1:
                    if (byteBuf.readUnsignedByte() != 1) {
                        return;
                    }
                    this.sendPingAndClose(channelHandlerContext,
                            this.toArray(String.format("1\0%d\0%s\0%s\0%d\0%d", 127,
                                    asyncServerPingEvent.getPing().getVersion().getName(),
                                    asyncServerPingEvent.getPing().getDescription().getText(),
                                    asyncServerPingEvent.getPing().getPlayers().getOnline(),
                                    asyncServerPingEvent.getPing().getPlayers().getMax())));
                    break;
                default:
                    boolean checkFlag = byteBuf.readUnsignedByte() == 1;
                    checkFlag &= byteBuf.readUnsignedByte() == 250;
                    checkFlag &= "MC|PingHost".equals(
                            new String(byteBuf.readBytes(byteBuf.readShort() * 2).array(), Charsets.UTF_16));

                    int checkShort = byteBuf.readShort();

                    checkFlag &= byteBuf.readUnsignedByte() >= 73;
                    checkFlag &= 3 + byteBuf.readBytes(byteBuf.readShort() * 2).array().length
                            + 4 == checkShort;
                    checkFlag &= byteBuf.readInt() <= '\uffff';
                    checkFlag &= byteBuf.readableBytes() == 0;

                    if (!checkFlag) {
                        return;
                    }

                    this.sendPingAndClose(channelHandlerContext,
                            this.toArray(String.format("1\0%d\0%s\0%s\0%d\0%d", 127,
                                    asyncServerPingEvent.getPing().getVersion().getName(),
                                    asyncServerPingEvent.getPing().getDescription().getText(),
                                    asyncServerPingEvent.getPing().getPlayers().getOnline(),
                                    asyncServerPingEvent.getPing().getPlayers().getMax())));
                    break;
                }
            } else {
                this.close(channelHandlerContext);
            }
            repliedPing = false;
        } else if (packetId == 0x02 && byteBuf.isReadable()) {
            this.sendPingAndClose(channelHandlerContext, this.toArray(ChatColor.RED + "Outdated Client"));
            repliedPing = false;
        }
    } catch (Exception e) {
        return;
    } finally {
        if (repliedPing) {
            byteBuf.resetReaderIndex();
            channelHandlerContext.channel().pipeline().remove("legacy_ping");
            channelHandlerContext.fireChannelRead(byteBuf.retain());
        }
    }
}

---

From source file:org.bgp4j.netty.protocol.open.CapabilityCodec.java

License:Apache License

public static Capability decodeCapability(ByteBuf buffer) {
    Capability cap = null;// w w  w  .  j a  v  a2s. com

    try {
        buffer.markReaderIndex();

        int type = buffer.readUnsignedByte();

        switch (type) {
        case BGPv4Constants.BGP_CAPABILITY_TYPE_MULTIPROTOCOL:
            cap = decodeMultiProtocolCapability(buffer);
            break;
        case BGPv4Constants.BGP_CAPABILITY_TYPE_ROUTE_REFRESH:
            cap = decodeRouteRefreshCapability(buffer);
            break;
        case BGPv4Constants.BGP_CAPABILITY_TYPE_AS4_NUMBERS:
            cap = decodeAutonomousSystem4Capability(buffer);
            break;
        case BGPv4Constants.BGP_CAPABILITY_TYPE_OUTBOUND_ROUTE_FILTERING:
            cap = decodeOutboundRouteFilteringCapability(buffer);
            break;
        default:
            cap = decodeUnknownCapability(type, buffer);
            break;
        }
    } catch (CapabilityException e) {
        buffer.resetReaderIndex();

        int type = buffer.readUnsignedByte();
        int capLength = buffer.readUnsignedByte();

        byte[] capPacket = new byte[capLength + 2];

        buffer.readBytes(capPacket, 2, capLength);
        capPacket[0] = (byte) type;
        capPacket[1] = (byte) capLength;

        e.setCapability(capPacket);
        throw e;
    }

    return cap;
}

---

From source file:org.bgp4j.netty.protocol.update.UpdatePacketDecoder.java

License:Apache License

private List<PathAttribute> decodePathAttributes(ByteBuf buffer) {
    List<PathAttribute> attributes = new LinkedList<PathAttribute>();

    while (buffer.isReadable()) {
        buffer.markReaderIndex();//from ww w. j  a v a2  s .  c  o m

        try {
            int flagsType = buffer.readUnsignedShort();
            boolean optional = ((flagsType & BGPv4Constants.BGP_PATH_ATTRIBUTE_OPTIONAL_BIT) != 0);
            boolean transitive = ((flagsType & BGPv4Constants.BGP_PATH_ATTRIBUTE_TRANSITIVE_BIT) != 0);
            boolean partial = ((flagsType & BGPv4Constants.BGP_PATH_ATTRIBUTE_PARTIAL_BIT) != 0);
            int typeCode = (flagsType & BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_MASK);
            int valueLength = 0;

            if ((flagsType & BGPv4Constants.BGP_PATH_ATTRIBUTE_EXTENDED_LENGTH_BIT) != 0)
                valueLength = buffer.readUnsignedShort();
            else
                valueLength = buffer.readUnsignedByte();

            ByteBuf valueBuffer = buffer.readSlice(valueLength);

            PathAttribute attr = null;

            switch (typeCode) {
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_AGGREGATOR:
                attr = decodeAggregatorPathAttribute(valueBuffer, ASType.AS_NUMBER_2OCTETS);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_AS4_AGGREGATOR:
                attr = decodeAggregatorPathAttribute(valueBuffer, ASType.AS_NUMBER_4OCTETS);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_AS4_PATH:
                attr = decodeASPathAttribute(valueBuffer, ASType.AS_NUMBER_4OCTETS);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_AS_PATH:
                attr = decodeASPathAttribute(valueBuffer, ASType.AS_NUMBER_2OCTETS);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_ATOMIC_AGGREGATE:
                attr = decodeAtomicAggregatePathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_COMMUNITIES:
                attr = decodeCommunityPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_LOCAL_PREF:
                attr = decodeLocalPrefPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_MULTI_EXIT_DISC:
                attr = decodeMultiExitDiscPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_NEXT_HOP:
                attr = decodeNextHopPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_ORIGIN:
                attr = decodeOriginPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_MP_REACH_NLRI:
                attr = decodeMpReachNlriPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_MP_UNREACH_NLRI:
                attr = decodeMpUnreachNlriPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_ORIGINATOR_ID:
                attr = decodeOriginatorIDPathAttribute(valueBuffer);
                break;
            case BGPv4Constants.BGP_PATH_ATTRIBUTE_TYPE_CLUSTER_LIST:
                attr = decodeClusterListPathAttribute(valueBuffer);
                break;
            default: {
                byte[] value = new byte[valueBuffer.readableBytes()];

                valueBuffer.readBytes(value);
                attr = new UnknownPathAttribute(typeCode, value);
            }
                break;
            }
            attr.setOptional(optional);
            attr.setTransitive(transitive);
            attr.setPartial(partial);

            attributes.add(attr);
        } catch (AttributeException ex) {
            int endReadIndex = buffer.readerIndex();

            buffer.resetReaderIndex();

            int attributeLength = endReadIndex - buffer.readerIndex();
            byte[] packet = new byte[attributeLength];

            buffer.readBytes(packet);
            ex.setOffendingAttribute(packet);

            throw ex;
        } catch (IndexOutOfBoundsException ex) {
            int endReadIndex = buffer.readerIndex();

            buffer.resetReaderIndex();

            int attributeLength = endReadIndex - buffer.readerIndex();
            byte[] packet = new byte[attributeLength];

            buffer.readBytes(packet);

            throw new AttributeLengthException(packet);
        }

    }

    return attributes;
}

---

From source file:org.clitherproject.clither.server.net.PacketDecoder.java

License:Open Source License

@SuppressWarnings("deprecation")
@Override/*from  www  .j  a  va  2s  . c o  m*/
protected void decode(ChannelHandlerContext ctx, WebSocketFrame frame, List<Object> out) throws Exception {
    ByteBuf buf = frame.content().order(ByteOrder.BIG_ENDIAN);
    if (buf.capacity() < 1) {
        // Discard empty messages
        return;
    }

    buf.resetReaderIndex();
    int packetId = buf.readUnsignedByte();
    Packet packet = PacketRegistry.SERVERBOUND.constructPacket(packetId);

    if (packet == null) {
        return;
    }

    ClitherServer.log.finest("Received packet " + " (" + packet.getClass().getSimpleName() + ") from "
            + ctx.channel().remoteAddress());

    packet.readData(buf);
    out.add(packet);
}

---

From source file:org.diorite.impl.connection.packets.PacketSizer.java

License:Open Source License

@Override
protected void decode(final ChannelHandlerContext context, final ByteBuf byteBuf, final List<Object> objects) {
    byteBuf.markReaderIndex();//from w  w w .  j a  v  a 2s .co m

    final byte[] arrayOfByte = new byte[3];
    for (int i = 0; i < arrayOfByte.length; i++) {
        if (!byteBuf.isReadable()) {
            byteBuf.resetReaderIndex();
            return;
        }
        arrayOfByte[i] = byteBuf.readByte();
        if (arrayOfByte[i] >= 0) {
            final PacketDataSerializer dataSerializer = new PacketDataSerializer(
                    Unpooled.wrappedBuffer(arrayOfByte));
            try {
                final int size = dataSerializer.readVarInt();
                if (byteBuf.readableBytes() < size) {
                    byteBuf.resetReaderIndex();
                    return;
                }
                objects.add(byteBuf.readBytes(size));
                return;
            } finally {
                dataSerializer.release();
            }
        }
    }
    throw new CorruptedFrameException("length wider than 21-bit");
}

---

From source file:org.dna.mqtt.moquette.parser.netty.ConnectDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws UnsupportedEncodingException {
    in.resetReaderIndex();
    //Common decoding part
    ConnectMessage message = new ConnectMessage();
    if (!decodeCommonHeader(message, 0x00, in)) {
        in.resetReaderIndex();/*ww  w.ja v a2 s . c  om*/
        return;
    }
    int remainingLength = message.getRemainingLength();
    int start = in.readerIndex();

    int protocolNameLen = in.readUnsignedShort();
    byte[] encProtoName;
    String protoName;
    Attribute<Integer> versionAttr = ctx.attr(MQTTDecoder.PROTOCOL_VERSION);
    switch (protocolNameLen) {
    case 6:
        //MQTT version 3.1 "MQIsdp"
        //ProtocolName 8 bytes or 6 bytes
        if (in.readableBytes() < 10) {
            in.resetReaderIndex();
            return;
        }

        encProtoName = new byte[6];
        in.readBytes(encProtoName);
        protoName = new String(encProtoName, "UTF-8");
        if (!"MQIsdp".equals(protoName)) {
            in.resetReaderIndex();
            throw new CorruptedFrameException("Invalid protoName: " + protoName);
        }
        message.setProtocolName(protoName);

        versionAttr.set((int) VERSION_3_1);
        break;
    case 4:
        //MQTT version 3.1.1 "MQTT"
        //ProtocolName 6 bytes
        if (in.readableBytes() < 8) {
            in.resetReaderIndex();
            return;
        }
        encProtoName = new byte[4];
        in.readBytes(encProtoName);
        protoName = new String(encProtoName, "UTF-8");
        if (!"MQTT".equals(protoName)) {
            in.resetReaderIndex();
            throw new CorruptedFrameException("Invalid protoName: " + protoName);
        }
        message.setProtocolName(protoName);
        versionAttr.set((int) VERSION_3_1_1);
        break;
    default:
        //protocol broken
        throw new CorruptedFrameException("Invalid protoName size: " + protocolNameLen);
    }

    //ProtocolVersion 1 byte (value 0x03 for 3.1, 0x04 for 3.1.1)
    message.setProcotolVersion(in.readByte());
    if (message.getProcotolVersion() == VERSION_3_1_1) {
        //if 3.1.1, check the flags (dup, retain and qos == 0)
        if (message.isDupFlag() || message.isRetainFlag()
                || message.getQos() != AbstractMessage.QOSType.MOST_ONE) {
            throw new CorruptedFrameException("Received a CONNECT with fixed header flags != 0");
        }

        //check if this is another connect from the same client on the same session
        Attribute<Boolean> connectAttr = ctx.attr(ConnectDecoder.CONNECT_STATUS);
        Boolean alreadyConnected = connectAttr.get();
        if (alreadyConnected == null) {
            //never set
            connectAttr.set(true);
        } else if (alreadyConnected) {
            throw new CorruptedFrameException("Received a second CONNECT on the same network connection");
        }
    }

    //Connection flag
    byte connFlags = in.readByte();
    if (message.getProcotolVersion() == VERSION_3_1_1) {
        if ((connFlags & 0x01) != 0) { //bit(0) of connection flags is != 0
            throw new CorruptedFrameException("Received a CONNECT with connectionFlags[0(bit)] != 0");
        }
    }

    boolean cleanSession = ((connFlags & 0x02) >> 1) == 1;
    boolean willFlag = ((connFlags & 0x04) >> 2) == 1;
    byte willQos = (byte) ((connFlags & 0x18) >> 3);
    if (willQos > 2) {
        in.resetReaderIndex();
        throw new CorruptedFrameException("Expected will QoS in range 0..2 but found: " + willQos);
    }
    boolean willRetain = ((connFlags & 0x20) >> 5) == 1;
    boolean passwordFlag = ((connFlags & 0x40) >> 6) == 1;
    boolean userFlag = ((connFlags & 0x80) >> 7) == 1;
    //a password is true iff user is true.
    if (!userFlag && passwordFlag) {
        in.resetReaderIndex();
        throw new CorruptedFrameException(
                "Expected password flag to true if the user flag is true but was: " + passwordFlag);
    }
    message.setCleanSession(cleanSession);
    message.setWillFlag(willFlag);
    message.setWillQos(willQos);
    message.setWillRetain(willRetain);
    message.setPasswordFlag(passwordFlag);
    message.setUserFlag(userFlag);

    //Keep Alive timer 2 bytes
    //int keepAlive = Utils.readWord(in);
    int keepAlive = in.readUnsignedShort();
    message.setKeepAlive(keepAlive);

    if ((remainingLength == 12 && message.getProcotolVersion() == VERSION_3_1)
            || (remainingLength == 10 && message.getProcotolVersion() == VERSION_3_1_1)) {
        out.add(message);
        return;
    }

    //Decode the ClientID
    String clientID = Utils.decodeString(in);
    if (clientID == null) {
        in.resetReaderIndex();
        return;
    }
    message.setClientID(clientID);

    //Decode willTopic
    if (willFlag) {
        String willTopic = Utils.decodeString(in);
        if (willTopic == null) {
            in.resetReaderIndex();
            return;
        }
        message.setWillTopic(willTopic);
    }

    //Decode willMessage
    if (willFlag) {
        String willMessage = Utils.decodeString(in);
        if (willMessage == null) {
            in.resetReaderIndex();
            return;
        }
        message.setWillMessage(willMessage);
    }

    //Compatibility check with v3.0, remaining length has precedence over
    //the user and password flags
    int readed = in.readerIndex() - start;
    if (readed == remainingLength) {
        out.add(message);
        return;
    }

    //Decode username
    if (userFlag) {
        String userName = Utils.decodeString(in);
        if (userName == null) {
            in.resetReaderIndex();
            return;
        }
        message.setUsername(userName);
    }

    readed = in.readerIndex() - start;
    if (readed == remainingLength) {
        out.add(message);
        return;
    }

    //Decode password
    if (passwordFlag) {
        String password = Utils.decodeString(in);
        if (password == null) {
            in.resetReaderIndex();
            return;
        }
        message.setPassword(password);
    }

    out.add(message);
}

---

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