Example usage for io.netty.buffer ByteBuf resetReaderIndex

List of usage examples for io.netty.buffer ByteBuf resetReaderIndex

  1. HOME
  2. Java
  3. io.netty
  4. io.netty.buffer.*
  5. ByteBuf
  6. 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.jmqtt.core.codec.PingReqDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws Exception {
    //Common decoding part
    in.resetReaderIndex();
    PingReqPacket message = new PingReqPacket();
    if (!decodeCommonHeader(message, 0x00, in)) {
        in.resetReaderIndex();/*from  w  w  w  .  j  a v a  2  s. c o m*/
        return;
    }
    out.add(message);
}

From source file:org.jmqtt.core.codec.PingRespDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws Exception {
    //Common decoding part
    in.resetReaderIndex();
    PingRespPacket message = new PingRespPacket();
    if (!decodeCommonHeader(message, 0x00, in)) {
        in.resetReaderIndex();//from  ww w .  j  av  a2 s.c o m
        return;
    }
    out.add(message);
}

From source file:org.jmqtt.core.codec.PublishDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws Exception {
    LOG.debug("decode invoked with buffer {}", in);
    in.resetReaderIndex();
    int startPos = in.readerIndex();

    //Common decoding part
    PublishPacket message = new PublishPacket();
    if (!decodeCommonHeader(message, in)) {
        LOG.debug("decode ask for more data after {}", in);
        in.resetReaderIndex();/* w w  w  . j a  va 2  s  .  c o  m*/
        return;
    }

    if (MqttUtils.isMQTT3_1_1(ctx)) {
        if (message.getQos() == QosType.MOST_ONE && message.isDupFlag()) {
            //bad protocol, if QoS=0 => DUP = 0
            throw new CorruptedFrameException("Received a PUBLISH with QoS=0 & DUP = 1, MQTT 3.1.1 violation");
        }

        if (message.getQos() == QosType.RESERVED) {
            throw new CorruptedFrameException(
                    "Received a PUBLISH with QoS flags setted 10 b11, MQTT 3.1.1 violation");
        }
    }

    int remainingLength = message.getRemainingLength();

    //Topic name
    String topic = MqttUtils.decodeString(in);
    if (topic == null) {
        in.resetReaderIndex();
        return;
    }
    //[MQTT-3.3.2-2] The Topic Name in the PUBLISH Packet MUST NOT contain wildcard characters.
    if (topic.contains("+") || topic.contains("#")) {
        throw new CorruptedFrameException(
                "Received a PUBLISH with topic containing wild card chars, topic: " + topic);
    }
    //check topic is at least one char [MQTT-4.7.3-1]
    if (topic.length() == 0) {
        throw new CorruptedFrameException("Received a PUBLISH with topic without any character");
    }

    message.setTopicName(topic);

    if (message.getQos() == QosType.LEAST_ONE || message.getQos() == QosType.EXACTLY_ONCE) {
        message.setPacketId(in.readUnsignedShort());
    }
    int stopPos = in.readerIndex();

    //read the payload
    int payloadSize = remainingLength - (stopPos - startPos - 2)
            + (MqttUtils.numBytesToEncode(remainingLength) - 1);
    if (in.readableBytes() < payloadSize) {
        in.resetReaderIndex();
        return;
    }
    ByteBuf bb = Unpooled.buffer(payloadSize);
    in.readBytes(bb);
    message.setPayload(bb.nioBuffer());

    out.add(message);
}

From source file:org.jmqtt.core.codec.PubRelDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws UnsupportedEncodingException {
    in.resetReaderIndex();
    //Common decoding part
    PacketIdPacket message = new PubRelPacket();
    if (!decodeCommonHeader(message, 0x02, in)) {
        in.resetReaderIndex();/*  w  w w  .j av  a 2  s.c om*/
        return;
    }

    //read  messageIDs
    message.setPacketId(in.readUnsignedShort());
    out.add(message);
}

From source file:org.jmqtt.core.codec.SubAckDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws Exception {
    //Common decoding part
    in.resetReaderIndex();
    SubAckPacket message = new SubAckPacket();
    if (!decodeCommonHeader(message, 0x00, in)) {
        in.resetReaderIndex();//from  w w w. j  a v a2  s.  co m
        return;
    }
    int remainingLength = message.getRemainingLength();

    //MessageID
    message.setPacketId(in.readUnsignedShort());
    remainingLength -= 2;

    //Qos array
    if (in.readableBytes() < remainingLength) {
        in.resetReaderIndex();
        return;
    }
    for (int i = 0; i < remainingLength; i++) {
        byte qos = in.readByte();
        message.addType(QosType.valueOf(qos));
    }

    out.add(message);
}

From source file:org.jmqtt.core.codec.SubscribeDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws Exception {
    //Common decoding part
    SubscribePacket message = new SubscribePacket();
    in.resetReaderIndex();
    if (!decodeCommonHeader(message, 0x02, in)) {
        in.resetReaderIndex();//from   w  w w . j a  va 2s  . c  o  m
        return;
    }

    //check qos level
    if (message.getQos() != QosType.LEAST_ONE) {
        throw new CorruptedFrameException(
                "Received SUBSCRIBE message with QoS other than LEAST_ONE, was: " + message.getQos());
    }

    int start = in.readerIndex();
    //read  messageIDs
    message.setPacketId(in.readUnsignedShort());
    int read = in.readerIndex() - start;
    while (read < message.getRemainingLength()) {
        decodeSubscription(in, message);
        read = in.readerIndex() - start;
    }

    if (message.subscriptions().isEmpty()) {
        throw new CorruptedFrameException("subscribe MUST have got at least 1 couple topic/QoS");
    }

    out.add(message);
}

From source file:org.jmqtt.core.codec.UnsubscribeDecoder.java

License:Open Source License

@Override
void decode(AttributeMap ctx, ByteBuf in, List<Object> out) throws Exception {
    //Common decoding part
    in.resetReaderIndex();
    UnsubscribePacket message = new UnsubscribePacket();
    if (!decodeCommonHeader(message, 0x02, in)) {
        in.resetReaderIndex();//from  w  w  w  .  j  a  v  a  2 s.  com
        return;
    }

    //check qos level
    if (message.getQos() != QosType.LEAST_ONE) {
        throw new CorruptedFrameException(
                "Found an Unsubscribe message with qos other than LEAST_ONE, was: " + message.getQos());
    }

    int start = in.readerIndex();
    //read  messageIDs
    message.setPacketId(in.readUnsignedShort());
    int read = in.readerIndex() - start;
    while (read < message.getRemainingLength()) {
        String topicFilter = MqttUtils.decodeString(in);
        //check topic is at least one char [MQTT-4.7.3-1]
        if (topicFilter.length() == 0) {
            throw new CorruptedFrameException("Received an UNSUBSCRIBE with empty topic filter");
        }
        message.addTopicFilter(topicFilter);
        read = in.readerIndex() - start;
    }
    if (message.topicFilters().isEmpty()) {
        throw new CorruptedFrameException("unsubscribe MUST have got at least 1 topic");
    }
    out.add(message);
}

From source file:org.l2junity.loginserver.network.client.crypt.Crypt.java

License:Open Source License

@Override
public void encrypt(ByteBuf buf) {
    // Ensure that byte order is little endian because we set new packet size in first 2 bytes
    if (buf.order() != ByteOrder.LITTLE_ENDIAN) {
        buf = buf.order(ByteOrder.LITTLE_ENDIAN);
    }//  w ww. j a v a2s. c  om

    // Checksum & XOR Key or Checksum only
    buf.writeZero(_static ? 8 : 4);

    // Padding
    buf.writeZero(8 - (buf.readableBytes() % 8));

    if (_static) {
        _static = false;

        int key = Rnd.nextInt();
        buf.skipBytes(4); // The first 4 bytes are ignored
        while (buf.readerIndex() < (buf.writerIndex() - 8)) {
            int data = buf.readInt();
            key += data;
            data ^= key;
            buf.setInt(buf.readerIndex() - 4, data);
        }
        buf.setInt(buf.readerIndex(), key);

        buf.resetReaderIndex();

        final byte[] block = new byte[8];
        while (buf.isReadable(8)) {
            buf.readBytes(block);
            STATIC_BLOWFISH_ENGINE.encryptBlock(block, 0);
            buf.setBytes(buf.readerIndex() - block.length, block);
        }
    } else {
        int checksum = 0;
        while (buf.isReadable(8)) {
            checksum ^= buf.readInt();
        }
        buf.setInt(buf.readerIndex(), checksum);

        buf.resetReaderIndex();

        final byte[] block = new byte[8];
        while (buf.isReadable(8)) {
            buf.readBytes(block);
            _blowfishEngine.encryptBlock(block, 0);
            buf.setBytes(buf.readerIndex() - block.length, block);
        }
    }
}

From source file:org.lanternpowered.pingy.PingyFramingHandler.java

License:MIT License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf buf, List<Object> output) throws Exception {
    while (readableVarInt(buf)) {
        buf.markReaderIndex();/*from  www  . j a va  2 s  .c  om*/

        final int length = readVarInt(buf);
        if (buf.readableBytes() < length) {
            buf.resetReaderIndex();
            break;
        }

        final ByteBuf msg = ctx.alloc().buffer(length);
        buf.readBytes(msg, length);

        output.add(msg);
    }
}

From source file:org.lanternpowered.pingy.PingyLegacyHandler.java

License:MIT License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg0) throws Exception {
    final ByteBuf msg = (ByteBuf) msg0;

    boolean legacy = false;
    msg.markReaderIndex();/*  w ww.  ja va 2 s  .  com*/
    try {
        // Try first as a legacy ping message
        int messageId = msg.readUnsignedByte();
        // Make sure that old clients don't attempt to login
        if (messageId == 0x02) {
            legacy = this.tryHandleLegacyJoin(ctx, msg);
        } else if (messageId == 0xfe) {
            legacy = this.tryHandleLegacyPing(ctx, msg);
        }
    } catch (Exception e) {
    }
    if (!legacy) {
        msg.resetReaderIndex();
        ctx.pipeline().remove(this);
        ctx.fireChannelRead(msg);
    } else {
        msg.release();
    }
}