Example usage for io.netty.buffer ByteBuf readSlice

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

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Introduction

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

Prototype

public abstract ByteBuf readSlice(int length);

Source Link

Document

Returns a new slice of this buffer's sub-region starting at the current readerIndex and increases the readerIndex by the size of the new slice (= length ).

Usage

From source file:org.opendaylight.protocol.rsvp.parser.spi.subobjects.XROSubobjectListParser.java

License:Open Source License

public List<SubobjectContainer> parseList(final ByteBuf byteBuf) throws RSVPParsingException {
    final List<SubobjectContainer> subs = new ArrayList<>();
    while (byteBuf.isReadable()) {
        final boolean mandatory = ((byteBuf.getUnsignedByte(byteBuf.readerIndex())
                & (1 << Values.FIRST_BIT_OFFSET)) != 0) ? true : false;
        final int type = UnsignedBytes.checkedCast(
                (byteBuf.readUnsignedByte() & Values.BYTE_MAX_VALUE_BYTES) & ~(1 << Values.FIRST_BIT_OFFSET));
        final int length = byteBuf.readUnsignedByte() - HEADER_LENGHT;
        if (length > byteBuf.readableBytes()) {
            throw new RSVPParsingException(
                    "Wrong length specified. Passed: " + length + "; Expected: <= " + byteBuf.readableBytes());
        }/*from   w w w  . j  ava 2s . c  o  m*/
        LOG.debug("Attempt to parse subobject from bytes: {}", ByteBufUtil.hexDump(byteBuf));
        final SubobjectContainer sub = this.subobjReg.parseSubobject(type, byteBuf.readSlice(length),
                mandatory);

        if (sub == null) {
            LOG.warn("Unknown subobject type: {}. Ignoring subobject.", type);
        } else {
            LOG.debug("Subobject was parsed. {}", sub);
            subs.add(sub);
        }
    }
    return subs;
}

From source file:org.redisson.client.handler.CommandDecoder.java

License:Apache License

public ByteBuf readBytes(ByteBuf is) throws IOException {
    long l = readLong(is);
    if (l > Integer.MAX_VALUE) {
        throw new IllegalArgumentException("Java only supports arrays up to " + Integer.MAX_VALUE + " in size");
    }//from ww  w  . j av  a 2s.  co m
    int size = (int) l;
    if (size == -1) {
        return null;
    }
    ByteBuf buffer = is.readSlice(size);
    int cr = is.readByte();
    int lf = is.readByte();
    if (cr != CR || lf != LF) {
        throw new IOException("Improper line ending: " + cr + ", " + lf);
    }
    return buffer;
}

From source file:org.redisson.codec.MapCacheEventCodec.java

License:Apache License

private Object decode(ByteBuf buf, State state, Decoder<?> decoder) throws IOException {
    int keyLen;/* ww  w.java 2s . co m*/
    if (osType == OSType.WINDOWS) {
        keyLen = buf.readIntLE();
    } else if (osType == OSType.HPNONSTOP) {
        keyLen = (int) buf.readLong();
    } else {
        keyLen = (int) buf.readLongLE();
    }
    ByteBuf keyBuf = buf.readSlice(keyLen);
    Object key = decoder.decode(keyBuf, state);
    return key;
}

From source file:org.springframework.boot.context.embedded.netty.HttpContentInputStream.java

License:Apache License

private ByteBuf readContent(int length) throws IOException {
    ByteBuf content = current.content();
    if (length < content.readableBytes()) {
        return content.readSlice(length);
    } else {/* w  w  w. j  a v  a 2  s . c  o  m*/
        return content;
    }
}

From source file:org.starnub.starnubserver.servers.starbound.TCPProxyServerPacketDecoder.java

License:Open Source License

@SuppressWarnings("unchecked")
@Override// w  w w  . j a  va  2s .  c  o m
public void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    switch (state()) {
    case READ_PACKET_ID: {
        packetIDIndex = in.readerIndex();
        byte packetId = in.getByte(packetIDIndex);
        packet = PACKET_POOL.get(packetId);
        checkpoint(DecoderState.READ_VLQ);
    }
    case READ_VLQ: {
        clearVLQ();
        int tempIndexMarker = packetIDIndex + 1;
        while (vlqLength <= 10) {
            int tmpByte = in.getByte(tempIndexMarker);
            payloadLength = (payloadLength << 7) | (tmpByte & 0x7f);
            vlqLength++;
            if ((tmpByte & 0x80) == 0) {
                break;
            }
            tempIndexMarker++;
        }
        if ((payloadLength & 1) == 0x00) {
            payloadLength = payloadLength >> 1;
        } else {
            payloadLength = -((payloadLength >> 1) + 1);
        }
        compressed = payloadLength < 0;
        if (compressed) {
            payloadLength = -payloadLength;
        }
        checkpoint(DecoderState.READ_PAYLOAD);
    }
    case READ_PAYLOAD: {
        if (packet != null) {
            CopyOnWriteArrayList<EventSubscription> hashSet = PACKET_EVENT_ROUTER.getEVENT_SUBSCRIPTION_MAP()
                    .get(packet.getClass());
            /* Handle Packet if there is an events handler for it, else do not create objects */
            if (hashSet != null) {
                in.skipBytes(1 + vlqLength);
                if (compressed) {
                    packet.read(Unpooled.wrappedBuffer(1, decompress(in.readBytes(payloadLength).array())));
                } else {
                    packet.read(in.readBytes(payloadLength));
                }
                for (EventSubscription<Packet> packetEventSubscription : hashSet) {
                    if (packet.isRecycle()) {
                        break;
                    }
                    try {
                        packetEventSubscription.getEVENT_HANDLER().onEvent(packet);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                /* Write packet out, if not recycling */
                if (!packet.isRecycle()) {
                    packet.routeToDestination();
                } else {
                    packet.resetRecycle();
                }
            } else {
                destinationCTX.writeAndFlush(in.readSlice(1 + vlqLength + payloadLength).retain(),
                        destinationCTX.voidPromise());
            }
        } else {
            destinationCTX.writeAndFlush(in.readSlice(1 + vlqLength + payloadLength).retain(),
                    destinationCTX.voidPromise());
        }
        checkpoint(DecoderState.READ_PACKET_ID);
        break;
    }
    default:
        throw new Error("Error Decoding - Reached the unreachable void.");
    }
}

From source file:org.traccar.protocol.AdmProtocolDecoder.java

License:Apache License

private Position parseCommandResponse(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
    if (deviceSession == null) {
        return null;
    }/*from  www . j  av a  2s  .  c  o  m*/

    Position position = new Position(getProtocolName());
    position.setDeviceId(deviceSession.getDeviceId());

    getLastLocation(position, null);

    int responseTextLength = buf.bytesBefore((byte) 0);
    if (responseTextLength < 0) {
        responseTextLength = CMD_RESPONSE_SIZE - 3;
    }
    position.set(Position.KEY_RESULT, buf.readSlice(responseTextLength).toString(StandardCharsets.UTF_8));

    return position;
}

From source file:org.traccar.protocol.AdmProtocolDecoder.java

License:Apache License

@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
    ByteBuf buf = (ByteBuf) msg;

    buf.readUnsignedShortLE(); // device id

    int size = buf.readUnsignedByte();
    if (size != CMD_RESPONSE_SIZE) {
        int type = buf.readUnsignedByte();
        if (type == MSG_IMEI) {
            getDeviceSession(channel, remoteAddress, buf.readSlice(15).toString(StandardCharsets.UTF_8));
        } else {//from  ww  w .  ja  va2 s .co m
            return decodeData(channel, remoteAddress, buf, type);
        }
    } else {
        return parseCommandResponse(channel, remoteAddress, buf);
    }

    return null;
}

From source file:org.traccar.protocol.AnytrekProtocolDecoder.java

License:Apache License

@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    ByteBuf buf = (ByteBuf) msg;

    buf.skipBytes(2); // header
    buf.readUnsignedShortLE(); // size
    int type = buf.readUnsignedByte();

    String imei = ByteBufUtil.hexDump(buf.readSlice(8)).substring(2);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }//from  w  w  w .  java2  s. co m

    Position position = new Position(getProtocolName());
    position.setDeviceId(deviceSession.getDeviceId());

    position.set(Position.KEY_VERSION_FW, buf.readUnsignedShortLE());
    position.set(Position.KEY_BATTERY, buf.readUnsignedShortLE() * 0.01);
    position.set(Position.KEY_RSSI, buf.readUnsignedByte());

    DateBuilder dateBuilder = new DateBuilder()
            .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
            .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
    position.setTime(dateBuilder.getDate());

    position.set(Position.KEY_SATELLITES, BitUtil.to(buf.readUnsignedByte(), 4));

    double latitude = buf.readUnsignedIntLE() / 1800000.0;
    double longitude = buf.readUnsignedIntLE() / 1800000.0;
    position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));

    int flags = buf.readUnsignedShortLE();
    position.setCourse(BitUtil.to(flags, 10));
    position.setValid(BitUtil.check(flags, 12));

    if (!BitUtil.check(flags, 10)) {
        latitude = -latitude;
    }
    if (BitUtil.check(flags, 11)) {
        longitude = -longitude;
    }

    position.setLatitude(latitude);
    position.setLongitude(longitude);

    buf.readUnsignedIntLE(); // info index
    buf.readUnsignedIntLE(); // setting index

    flags = buf.readUnsignedByte();
    position.set(Position.KEY_CHARGE, BitUtil.check(flags, 0));
    position.set(Position.KEY_IGNITION, BitUtil.check(flags, 1));
    position.set(Position.KEY_ALARM, BitUtil.check(flags, 4) ? Position.ALARM_GENERAL : null);

    buf.readUnsignedShortLE(); // charge current

    position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());

    sendResponse(channel, remoteAddress, type);

    return position;
}

From source file:org.traccar.protocol.ApelProtocolDecoder.java

License:Apache License

@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    ByteBuf buf = (ByteBuf) msg;
    int type = buf.readUnsignedShortLE();
    boolean alarm = (type & 0x8000) != 0;
    type = type & 0x7FFF;//ww  w  .  j a va 2 s.  c  o  m
    buf.readUnsignedShortLE(); // length

    if (alarm) {
        sendSimpleMessage(channel, MSG_ACK_ALARM);
    }

    if (type == MSG_TRACKER_ID) {
        return null; // unsupported authentication type
    }

    if (type == MSG_TRACKER_ID_EXT) {

        buf.readUnsignedIntLE(); // id
        int length = buf.readUnsignedShortLE();
        buf.skipBytes(length);
        length = buf.readUnsignedShortLE();
        getDeviceSession(channel, remoteAddress, buf.readSlice(length).toString(StandardCharsets.US_ASCII));

    } else if (type == MSG_LAST_LOG_INDEX) {

        long index = buf.readUnsignedIntLE();
        if (index > 0) {
            newIndex = index;
            requestArchive(channel);
        }

    } else if (type == MSG_CURRENT_GPS_DATA || type == MSG_STATE_FULL_INFO_T104 || type == MSG_LOG_RECORDS) {

        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
        if (deviceSession == null) {
            return null;
        }

        List<Position> positions = new LinkedList<>();

        int recordCount = 1;
        if (type == MSG_LOG_RECORDS) {
            recordCount = buf.readUnsignedShortLE();
        }

        for (int j = 0; j < recordCount; j++) {
            Position position = new Position(getProtocolName());
            position.setDeviceId(deviceSession.getDeviceId());

            int subtype = type;
            if (type == MSG_LOG_RECORDS) {
                position.set(Position.KEY_ARCHIVE, true);
                lastIndex = buf.readUnsignedIntLE() + 1;
                position.set(Position.KEY_INDEX, lastIndex);

                subtype = buf.readUnsignedShortLE();
                if (subtype != MSG_CURRENT_GPS_DATA && subtype != MSG_STATE_FULL_INFO_T104) {
                    buf.skipBytes(buf.readUnsignedShortLE());
                    continue;
                }
                buf.readUnsignedShortLE(); // length
            }

            position.setTime(new Date(buf.readUnsignedIntLE() * 1000));
            position.setLatitude(buf.readIntLE() * 180.0 / 0x7FFFFFFF);
            position.setLongitude(buf.readIntLE() * 180.0 / 0x7FFFFFFF);

            if (subtype == MSG_STATE_FULL_INFO_T104) {
                int speed = buf.readUnsignedByte();
                position.setValid(speed != 255);
                position.setSpeed(UnitsConverter.knotsFromKph(speed));
                position.set(Position.KEY_HDOP, buf.readByte());
            } else {
                int speed = buf.readShortLE();
                position.setValid(speed != -1);
                position.setSpeed(UnitsConverter.knotsFromKph(speed * 0.01));
            }

            position.setCourse(buf.readShortLE() * 0.01);
            position.setAltitude(buf.readShortLE());

            if (subtype == MSG_STATE_FULL_INFO_T104) {

                position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());
                position.set(Position.KEY_RSSI, buf.readUnsignedByte());
                position.set(Position.KEY_EVENT, buf.readUnsignedShortLE());
                position.set(Position.KEY_ODOMETER, buf.readUnsignedIntLE());
                position.set(Position.KEY_INPUT, buf.readUnsignedByte());
                position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());

                for (int i = 1; i <= 8; i++) {
                    position.set(Position.PREFIX_ADC + i, buf.readUnsignedShortLE());
                }

                position.set(Position.PREFIX_COUNT + 1, buf.readUnsignedIntLE());
                position.set(Position.PREFIX_COUNT + 2, buf.readUnsignedIntLE());
                position.set(Position.PREFIX_COUNT + 3, buf.readUnsignedIntLE());
            }

            positions.add(position);
        }

        buf.readUnsignedIntLE(); // crc

        if (type == MSG_LOG_RECORDS) {
            requestArchive(channel);
        } else {
            sendSimpleMessage(channel, MSG_REQUEST_LAST_LOG_INDEX);
        }

        return positions;
    }

    return null;
}

From source file:org.traccar.protocol.AplicomProtocolDecoder.java

License:Apache License

private void decodeCanData(ByteBuf buf, Position position) {

    buf.readUnsignedMedium(); // packet identifier
    position.set(Position.KEY_VERSION_FW, buf.readUnsignedByte());
    int count = buf.readUnsignedByte();
    buf.readUnsignedByte(); // batch count
    buf.readUnsignedShort(); // selector bit
    buf.readUnsignedInt(); // timestamp

    buf.skipBytes(8);/* w w  w.  j  av  a 2s .c  o m*/

    ArrayList<ByteBuf> values = new ArrayList<>(count);

    for (int i = 0; i < count; i++) {
        values.add(buf.readSlice(8));
    }

    for (int i = 0; i < count; i++) {
        ByteBuf value = values.get(i);
        switch (buf.readInt()) {
        case 0x20D:
            position.set(Position.KEY_RPM, value.readShortLE());
            position.set("dieselTemperature", value.readShortLE() * 0.1);
            position.set("batteryVoltage", value.readShortLE() * 0.01);
            position.set("supplyAirTempDep1", value.readShortLE() * 0.1);
            break;
        case 0x30D:
            position.set("activeAlarm", ByteBufUtil.hexDump(value));
            break;
        case 0x40C:
            position.set("airTempDep1", value.readShortLE() * 0.1);
            position.set("airTempDep2", value.readShortLE() * 0.1);
            break;
        case 0x40D:
            position.set("coldUnitState", ByteBufUtil.hexDump(value));
            break;
        case 0x50C:
            position.set("defrostTempDep1", value.readShortLE() * 0.1);
            position.set("defrostTempDep2", value.readShortLE() * 0.1);
            break;
        case 0x50D:
            position.set("condenserPressure", value.readShortLE() * 0.1);
            position.set("suctionPressure", value.readShortLE() * 0.1);
            break;
        case 0x58C:
            value.readByte();
            value.readShort(); // index
            switch (value.readByte()) {
            case 0x01:
                position.set("setpointZone1", value.readIntLE() * 0.1);
                break;
            case 0x02:
                position.set("setpointZone2", value.readIntLE() * 0.1);
                break;
            case 0x05:
                position.set("unitType", value.readIntLE());
                break;
            case 0x13:
                position.set("dieselHours", value.readIntLE() / 60 / 60);
                break;
            case 0x14:
                position.set("electricHours", value.readIntLE() / 60 / 60);
                break;
            case 0x17:
                position.set("serviceIndicator", value.readIntLE());
                break;
            case 0x18:
                position.set("softwareVersion", value.readIntLE() * 0.01);
                break;
            default:
                break;
            }
            break;
        default:
            LOGGER.warn("Aplicom CAN decoding error", new UnsupportedOperationException());
            break;
        }
    }
}