Example usage for io.netty.buffer ByteBuf readUnsignedMedium

Introduction

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

Prototype

public abstract int readUnsignedMedium();

Source Link

Document

Gets an unsigned 24-bit medium integer at the current readerIndex and increases the readerIndex by 3 in this buffer.

Usage

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.readUnsignedByte(); // header

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress,
            buf.readSlice(7).toString(StandardCharsets.US_ASCII));
    if (deviceSession == null) {
        return null;
    }//from w w w. j  a  va 2 s .  c om

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

    position.set("eventType", buf.readUnsignedByte());
    position.set("packetVersion", buf.readUnsignedByte());
    position.set(Position.KEY_STATUS, buf.readUnsignedByte());
    position.set(Position.KEY_RSSI, buf.readUnsignedByte());
    position.set(Position.KEY_GPS, buf.readUnsignedByte());

    position.setTime(new DateBuilder()
            .setDateReverse(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
            .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte()).getDate());

    position.setValid(true);

    double lat = buf.getUnsignedShort(buf.readerIndex()) / 100;
    lat += (buf.readUnsignedShort() % 100 * 10000 + buf.readUnsignedShort()) / 600000.0;
    position.setLatitude(buf.readUnsignedByte() == 'S' ? -lat : lat);

    double lon = buf.getUnsignedMedium(buf.readerIndex()) / 100;
    lon += (buf.readUnsignedMedium() % 100 * 10000 + buf.readUnsignedShort()) / 600000.0;
    position.setLongitude(buf.readUnsignedByte() == 'W' ? -lon : lon);

    position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));

    position.set(Position.KEY_INPUT, buf.readUnsignedShort());
    position.set(Position.KEY_OUTPUT, buf.readUnsignedByte());

    position.set("analogAlerts", buf.readUnsignedByte());
    position.set("customAlertTypes", buf.readUnsignedShort());

    for (int i = 1; i <= 5; i++) {
        position.set(Position.PREFIX_ADC + i, buf.readUnsignedShort());
    }

    position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium());
    position.set(Position.KEY_RPM, buf.readUnsignedShort());

    if (channel != null) {
        channel.writeAndFlush(
                new NetworkMessage(Unpooled.copiedBuffer("ACK", StandardCharsets.US_ASCII), remoteAddress));
    }

    return position;
}

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

License:Apache License

private void decodeExtraData(Position position, ByteBuf buf, int end) {
    while (buf.readerIndex() < end) {

        int type = buf.readUnsignedByte();
        int length = buf.readUnsignedByte();
        if (length == 255) {
            length += buf.readUnsignedByte();
        }//  ww w  .  ja  v a  2s .  c  o  m

        int n;

        switch (type) {
        case 2:
            position.set(Position.KEY_ODOMETER_TRIP, buf.readUnsignedMedium());
            break;
        case 5:
            position.set(Position.KEY_INPUT, buf.readUnsignedByte());
            break;
        case 6:
            n = buf.readUnsignedByte() >> 4;
            if (n < 2) {
                position.set(Position.PREFIX_ADC + n, buf.readFloat());
            } else {
                position.set("di" + (n - 2), buf.readFloat());
            }
            break;
        case 7:
            int alarm = buf.readUnsignedByte();
            buf.readUnsignedByte();
            if (BitUtil.check(alarm, 5)) {
                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
            }
            break;
        case 8:
            position.set("antihijack", buf.readUnsignedByte());
            break;
        case 9:
            position.set("unauthorized", ByteBufUtil.hexDump(buf.readSlice(8)));
            break;
        case 10:
            position.set("authorized", ByteBufUtil.hexDump(buf.readSlice(8)));
            break;
        case 24:
            for (int i = 0; i < length / 2; i++) {
                position.set(Position.PREFIX_TEMP + buf.readUnsignedByte(), buf.readByte());
            }
            break;
        case 28:
            position.set(Position.KEY_AXLE_WEIGHT, buf.readUnsignedShort());
            buf.readUnsignedByte();
            break;
        case 90:
            position.set(Position.KEY_POWER, buf.readFloat());
            break;
        case 101:
            position.set(Position.KEY_OBD_SPEED, buf.readUnsignedByte());
            break;
        case 102:
            position.set(Position.KEY_RPM, buf.readUnsignedByte() * 50);
            break;
        case 107:
            int fuel = buf.readUnsignedShort();
            int fuelFormat = fuel >> 14;
            if (fuelFormat == 1) {
                position.set("fuelValue", (fuel & 0x3fff) * 0.4 + "%");
            } else if (fuelFormat == 2) {
                position.set("fuelValue", (fuel & 0x3fff) * 0.5 + " l");
            } else if (fuelFormat == 3) {
                position.set("fuelValue", (fuel & 0x3fff) * -0.5 + " l");
            }
            break;
        case 108:
            position.set(Position.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 5);
            break;
        case 150:
            position.set(Position.KEY_DOOR, buf.readUnsignedByte());
            break;
        default:
            buf.skipBytes(length);
            break;
        }
    }
}

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.readUnsignedByte(); // protocol
    buf.readUnsignedShort(); // length
    int index = buf.readUnsignedByte() >> 3;

    if (channel != null) {
        ByteBuf response = Unpooled.copiedBuffer("^" + index, StandardCharsets.US_ASCII);
        channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
    }/*  ww w  .  ja  v  a 2  s  .  c o  m*/

    String id = String.valueOf(buf.readUnsignedInt());
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
    if (deviceSession == null) {
        return null;
    }

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

    while (buf.readableBytes() > 2) {

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

        int end = buf.readerIndex() + buf.readUnsignedByte();

        position.setTime(new Date(buf.readUnsignedInt() * 1000));

        int flags = buf.readUnsignedByte();
        position.set(Position.KEY_SATELLITES, BitUtil.from(flags, 2));
        position.setValid(BitUtil.to(flags, 2) > 0);

        // Latitude
        double lat = buf.readUnsignedMedium();
        lat = lat * -180 / 16777216 + 90;
        position.setLatitude(lat);

        // Longitude
        double lon = buf.readUnsignedMedium();
        lon = lon * 360 / 16777216 - 180;
        position.setLongitude(lon);

        // Status
        flags = buf.readUnsignedByte();
        position.set(Position.KEY_IGNITION, BitUtil.check(flags, 0));
        position.set(Position.KEY_RSSI, BitUtil.between(flags, 2, 5));
        position.setCourse((BitUtil.from(flags, 5) * 45 + 180) % 360);

        // Speed
        int speed = buf.readUnsignedByte();
        if (speed < 250) {
            position.setSpeed(UnitsConverter.knotsFromKph(speed));
        }

        decodeExtraData(position, buf, end);

        positions.add(position);
    }

    return positions;
}

---

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

License:Apache License

private boolean decodeGps(Position position, ByteBuf buf, int hardware) {

    int blockLength = buf.readUnsignedShort();
    int blockEnd = buf.readerIndex() + blockLength;

    if (blockLength < 22) {
        return false;
    }/*from w w w.  jav  a2  s. co  m*/

    position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());

    double lat;
    double lon;

    if (hardware == 0x10A || hardware == 0x10B) {
        lat = buf.readUnsignedInt() / 600000.0;
        lon = buf.readUnsignedInt() / 600000.0;
    } else {
        lat = buf.readUnsignedInt() / 100000.0 / 60.0;
        lon = buf.readUnsignedInt() / 100000.0 / 60.0;
    }

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

    position.setSpeed(buf.readUnsignedShort() * 0.01);

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

    int flags = buf.readUnsignedShort();
    position.setCourse(BitUtil.to(flags, 9));
    if (!BitUtil.check(flags, 10)) {
        lat = -lat;
    }
    position.setLatitude(lat);
    if (BitUtil.check(flags, 9)) {
        lon = -lon;
    }
    position.setLongitude(lon);
    position.setValid(BitUtil.check(flags, 11));

    buf.readerIndex(blockEnd);

    return true;
}

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

License:Apache License

private void decodePassengers(Position position, ByteBuf buf) {

    int blockLength = buf.readUnsignedShort();
    int blockEnd = buf.readerIndex() + blockLength;

    if (blockLength > 0) {

        position.set("passengersOn", buf.readUnsignedMedium());
        position.set("passengersOff", buf.readUnsignedMedium());

    }/*w w w  . j  av  a  2  s .  co m*/

    buf.readerIndex(blockEnd);

}

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From source file:org.virtue.network.protocol.ondemand.OnDemandDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf buf, List<Object> out) throws Exception {

    if (buf.readableBytes() < 6) {
        return;/*from www  . j  ava  2 s  .  c o m*/
    }

    int opcode = buf.readUnsignedByte();
    if (opcode == 0 || opcode == 1) {// file priority request || normal request
        out.add(new OnDemandRequestMessage(opcode == 1, buf.readUnsignedByte(), buf.readInt()));
    } else if (opcode == 2 || opcode == 3) {// client logged in || logged out
        out.add(new OnDemandStateMessage(opcode == 2, (buf.readUnsignedByte() | buf.readInt())));
    } else if (opcode == 4) {// encryption change
        out.add(new OnDemandEncryptionMessage(buf.readUnsignedByte(), buf.readInt()));
    } else if (opcode == 6) {// init connection
        out.add(new OnDemandInitMessage(buf.readUnsignedMedium(), buf.readShort()));
    } else if (opcode == 7) {// drop requests queue
        out.add(new OnDemandDropMessage(buf.readUnsignedByte() | buf.readInt()));
    }
}

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From source file:sas.systems.imflux.packet.rtcp.ReceptionReport.java

License:Apache License

public static ReceptionReport decode(ByteBuf buffer) {
    ReceptionReport block = new ReceptionReport();
    block.setSsrc(buffer.readUnsignedInt());
    block.setFractionLost(buffer.readUnsignedByte());
    block.setCumulativeNumberOfPacketsLost(buffer.readUnsignedMedium());
    block.setExtendedHighestSequenceNumberReceived(buffer.readUnsignedInt());
    block.setInterArrivalJitter(buffer.readUnsignedInt());
    block.setLastSenderReport(buffer.readUnsignedInt());
    block.setDelaySinceLastSenderReport(buffer.readUnsignedInt());
    return block;
}

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