Example usage for io.netty.buffer ByteBuf getByte

Introduction

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

Prototype

public abstract byte getByte(int index);

Source Link

Document

Gets a byte at the specified absolute index in this buffer.

Usage

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    // Find IMEI number
    int index = -1;
    for (int i = buf.readerIndex(); i < buf.writerIndex() - IMEI_LENGTH; i++) {
        index = i;//w ww .  jav a  2 s .  c  o  m
        for (int j = i; j < i + IMEI_LENGTH; j++) {
            if (!Character.isDigit((char) buf.getByte(j))) {
                index = -1;
                break;
            }
        }
        if (index > 0) {
            break;
        }
    }
    if (index == -1) {
        return null;
    }

    String imei = buf.toString(index, IMEI_LENGTH, StandardCharsets.US_ASCII);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
    if (deviceSession == null) {
        return null;
    }

    // Find NMEA sentence
    int start = BufferUtil.indexOf("GPRMC", buf);
    if (start == -1) {
        return null;
    }

    String sentence = buf.toString(start, buf.readableBytes() - start, StandardCharsets.US_ASCII);
    Parser parser = new Parser(PATTERN, sentence);
    if (!parser.matches()) {
        return null;
    }

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

    DateBuilder dateBuilder = new DateBuilder().setTime(parser.nextInt(0), parser.nextInt(0),
            parser.nextInt(0));

    position.setValid(parser.next().equals("A"));
    position.setLatitude(parser.nextCoordinate());
    position.setLongitude(parser.nextCoordinate());
    position.setSpeed(parser.nextDouble(0));
    position.setCourse(parser.nextDouble(0));

    dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
    position.setTime(dateBuilder.getDate());

    return position;
}

---

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.skipBytes(2); // header
    int type = buf.readUnsignedByte();
    buf.readUnsignedShort(); // length

    String id = decodeId(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte(),
            buf.readUnsignedByte());//w w  w. j a  v  a  2s .c  o  m

    sendResponse(channel, remoteAddress, buf.getByte(buf.writerIndex() - 2));

    if (type == MSG_POSITION_DATA || type == MSG_ROLLCALL_RESPONSE || type == MSG_ALARM_DATA
            || type == MSG_BLIND_AREA) {

        Position position = new Position(getProtocolName());

        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, "1" + id, id);
        if (deviceSession == null) {
            return null;
        }
        position.setDeviceId(deviceSession.getDeviceId());

        DateBuilder dateBuilder = new DateBuilder().setYear(BcdUtil.readInteger(buf, 2))
                .setMonth(BcdUtil.readInteger(buf, 2)).setDay(BcdUtil.readInteger(buf, 2))
                .setHour(BcdUtil.readInteger(buf, 2)).setMinute(BcdUtil.readInteger(buf, 2))
                .setSecond(BcdUtil.readInteger(buf, 2));
        position.setTime(dateBuilder.getDate());

        position.setLatitude(BcdUtil.readCoordinate(buf));
        position.setLongitude(BcdUtil.readCoordinate(buf));
        position.setSpeed(UnitsConverter.knotsFromKph(BcdUtil.readInteger(buf, 4)));
        position.setCourse(BcdUtil.readInteger(buf, 4));

        int flags = buf.readUnsignedByte();
        position.setValid((flags & 0x80) != 0);
        position.set(Position.KEY_SATELLITES, flags & 0x0f);

        position.set(Position.KEY_STATUS, buf.readUnsignedByte());
        position.set("key", buf.readUnsignedByte());
        position.set("oil", buf.readUnsignedShort() / 10.0);
        position.set(Position.KEY_POWER, buf.readUnsignedByte() + buf.readUnsignedByte() * 0.01);
        position.set(Position.KEY_ODOMETER, buf.readUnsignedInt());

        return position;
    }

    return null;
}

---

From source file:org.traccar.protocol.Gl200FrameDecoder.java

License:Apache License

public static boolean isBinary(ByteBuf buf) {
    String header = buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII);
    if (header.equals("+ACK")) {
        return buf.getByte(buf.readerIndex() + header.length()) != (byte) ':';
    } else {/*w ww . j av a2  s  .  c o m*/
        return BINARY_HEADERS.contains(header);
    }
}

---

From source file:org.traccar.protocol.Gt06FrameDecoder.java

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.readableBytes() < 5) {
        return null;
    }// w ww . j a v a2 s.  c  om

    int length = 2 + 2; // head and tail

    if (buf.getByte(buf.readerIndex()) == 0x78) {
        length += 1 + buf.getUnsignedByte(buf.readerIndex() + 2);
    } else {
        length += 2 + buf.getUnsignedShort(buf.readerIndex() + 2);
    }

    if (buf.readableBytes() >= length && buf.getUnsignedShort(buf.readerIndex() + length - 2) == 0x0d0a) {
        return buf.readRetainedSlice(length);
    }

    int endIndex = buf.readerIndex() - 1;
    do {
        endIndex = buf.indexOf(endIndex + 1, buf.writerIndex(), (byte) 0x0d);
        if (endIndex > 0 && buf.writerIndex() > endIndex + 1 && buf.getByte(endIndex + 1) == 0x0a) {
            return buf.readRetainedSlice(endIndex + 2 - buf.readerIndex());
        }
    } while (endIndex > 0);

    return null;
}

---

From source file:org.traccar.protocol.Gt06ProtocolDecoder.java

License:Apache License

private Object decodeWifi(Channel channel, ByteBuf buf, DeviceSession deviceSession, int type) {

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

    ByteBuf time = buf.readSlice(6);//from w w w  .  ja  va  2  s. c  om
    DateBuilder dateBuilder = new DateBuilder().setYear(BcdUtil.readInteger(time, 2))
            .setMonth(BcdUtil.readInteger(time, 2)).setDay(BcdUtil.readInteger(time, 2))
            .setHour(BcdUtil.readInteger(time, 2)).setMinute(BcdUtil.readInteger(time, 2))
            .setSecond(BcdUtil.readInteger(time, 2));
    getLastLocation(position, dateBuilder.getDate());

    Network network = new Network();

    int wifiCount = buf.getByte(2);
    for (int i = 0; i < wifiCount; i++) {
        String mac = String.format("%02x:%02x:%02x:%02x:%02x:%02x", buf.readUnsignedByte(),
                buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte(),
                buf.readUnsignedByte());
        network.addWifiAccessPoint(WifiAccessPoint.from(mac, buf.readUnsignedByte()));
    }

    int cellCount = buf.readUnsignedByte();
    int mcc = buf.readUnsignedShort();
    int mnc = buf.readUnsignedByte();
    for (int i = 0; i < cellCount; i++) {
        network.addCellTower(CellTower.from(mcc, mnc, buf.readUnsignedShort(), buf.readUnsignedShort(),
                buf.readUnsignedByte()));
    }

    position.setNetwork(network);

    if (channel != null) {
        ByteBuf response = Unpooled.buffer();
        response.writeShort(0x7878);
        response.writeByte(0);
        response.writeByte(type);
        response.writeBytes(time.resetReaderIndex());
        response.writeByte('\r');
        response.writeByte('\n');
        channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
    }

    return position;
}

---

From source file:org.traccar.protocol.Gt06ProtocolDecoder.java

License:Apache License

private Object decodeExtended(Channel channel, SocketAddress remoteAddress, ByteBuf buf) {

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
    if (deviceSession == null) {
        return null;
    }//  w  ww.j a v a  2s .  co m

    if (deviceSession.getTimeZone() == null) {
        deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
    }

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

    buf.readUnsignedShort(); // length
    int type = buf.readUnsignedByte();

    if (type == MSG_STRING_INFO) {

        buf.readUnsignedInt(); // server flag
        String data;
        if (buf.readUnsignedByte() == 1) {
            data = buf.readSlice(buf.readableBytes() - 6).toString(StandardCharsets.US_ASCII);
        } else {
            data = buf.readSlice(buf.readableBytes() - 6).toString(StandardCharsets.UTF_16BE);
        }

        if (decodeLocationString(position, data) == null) {
            getLastLocation(position, null);
            position.set(Position.KEY_RESULT, data);
        }

        return position;

    } else if (type == MSG_INFO) {

        int subType = buf.readUnsignedByte();

        getLastLocation(position, null);

        if (subType == 0x00) {
            position.set(Position.KEY_POWER, buf.readUnsignedShort() * 0.01);
            return position;
        } else if (subType == 0x05) {
            int flags = buf.readUnsignedByte();
            position.set(Position.KEY_DOOR, BitUtil.check(flags, 0));
            position.set(Position.PREFIX_IO + 1, BitUtil.check(flags, 2));
            return position;
        } else if (subType == 0x0a) {
            buf.skipBytes(8); // imei
            buf.skipBytes(8); // imsi
            position.set("iccid", ByteBufUtil.hexDump(buf.readSlice(8)));
            return position;
        } else if (subType == 0x0d) {
            if (buf.getByte(buf.readerIndex()) != '!') {
                buf.skipBytes(6);
            }
            return decodeFuelData(position,
                    buf.toString(buf.readerIndex(), buf.readableBytes() - 4 - 2, StandardCharsets.US_ASCII));
        }

    } else if (type == MSG_X1_PHOTO_DATA) {

        int pictureId = buf.readInt();

        ByteBuf photo = photos.get(pictureId);

        buf.readUnsignedInt(); // offset
        buf.readBytes(photo, buf.readUnsignedShort());

        if (photo.writableBytes() > 0) {
            sendPhotoRequest(channel, pictureId);
        } else {
            Device device = Context.getDeviceManager().getById(deviceSession.getDeviceId());
            position.set(Position.KEY_IMAGE,
                    Context.getMediaManager().writeFile(device.getUniqueId(), photo, "jpg"));
            photos.remove(pictureId).release();
        }

    } else if (type == MSG_AZ735_GPS || type == MSG_AZ735_ALARM) {

        if (!decodeGps(position, buf, true, deviceSession.getTimeZone())) {
            getLastLocation(position, position.getDeviceTime());
        }

        if (decodeLbs(position, buf, true)) {
            position.set(Position.KEY_RSSI, buf.readUnsignedByte());
        }

        buf.skipBytes(buf.readUnsignedByte()); // additional cell towers
        buf.skipBytes(buf.readUnsignedByte()); // wifi access point

        int status = buf.readUnsignedByte();
        position.set(Position.KEY_STATUS, status);

        if (type == MSG_AZ735_ALARM) {
            switch (status) {
            case 0xA0:
                position.set(Position.KEY_ARMED, true);
                break;
            case 0xA1:
                position.set(Position.KEY_ARMED, false);
                break;
            case 0xA2:
            case 0xA3:
                position.set(Position.KEY_ALARM, Position.ALARM_LOW_BATTERY);
                break;
            case 0xA4:
                position.set(Position.KEY_ALARM, Position.ALARM_GENERAL);
                break;
            case 0xA5:
                position.set(Position.KEY_ALARM, Position.ALARM_DOOR);
                break;
            default:
                break;
            }
        }

        buf.skipBytes(buf.readUnsignedByte()); // reserved extension

        sendResponse(channel, true, type, buf.getShort(buf.writerIndex() - 6), null);

        return position;

    } else if (type == MSG_OBD) {

        DateBuilder dateBuilder = new DateBuilder(deviceSession.getTimeZone())
                .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
                .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());

        getLastLocation(position, dateBuilder.getDate());

        position.set(Position.KEY_IGNITION, buf.readUnsignedByte() > 0);

        String data = buf.readCharSequence(buf.readableBytes() - 18, StandardCharsets.US_ASCII).toString();
        for (String pair : data.split(",")) {
            String[] values = pair.split("=");
            switch (Integer.parseInt(values[0].substring(0, 2), 16)) {
            case 40:
                position.set(Position.KEY_ODOMETER, Integer.parseInt(values[1], 16) * 0.01);
                break;
            case 43:
                position.set(Position.KEY_FUEL_LEVEL, Integer.parseInt(values[1], 16) * 0.01);
                break;
            case 45:
                position.set(Position.KEY_COOLANT_TEMP, Integer.parseInt(values[1], 16) * 0.01);
                break;
            case 53:
                position.set(Position.KEY_OBD_SPEED, Integer.parseInt(values[1], 16) * 0.01);
                break;
            case 54:
                position.set(Position.KEY_RPM, Integer.parseInt(values[1], 16) * 0.01);
                break;
            case 71:
                position.set(Position.KEY_FUEL_USED, Integer.parseInt(values[1], 16) * 0.01);
                break;
            case 73:
                position.set(Position.KEY_HOURS, Integer.parseInt(values[1], 16) * 0.01);
                break;
            case 74:
                position.set(Position.KEY_VIN, values[1]);
                break;
            default:
                break;
            }
        }

        return position;

    }

    return null;
}

---

From source file:org.traccar.protocol.H02FrameDecoder.java

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    char marker = (char) buf.getByte(buf.readerIndex());

    while (marker != '*' && marker != '$' && marker != 'X' && buf.readableBytes() > 0) {
        buf.skipBytes(1);//www  .j  av a 2 s  . co  m
        if (buf.readableBytes() > 0) {
            marker = (char) buf.getByte(buf.readerIndex());
        }
    }

    switch (marker) {
    case '*':

        // Return text message
        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '#');
        if (index != -1) {
            ByteBuf result = buf.readRetainedSlice(index + 1 - buf.readerIndex());
            while (buf.isReadable()
                    && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
                buf.readByte(); // skip new line
            }
            return result;
        }

        break;

    case '$':

        if (messageLength == 0) {
            if (buf.readableBytes() == MESSAGE_LONG) {
                messageLength = MESSAGE_LONG;
            } else {
                messageLength = MESSAGE_SHORT;
            }
        }

        if (buf.readableBytes() >= messageLength) {
            return buf.readRetainedSlice(messageLength);
        }

        break;

    case 'X':

        if (buf.readableBytes() >= MESSAGE_SHORT) {
            return buf.readRetainedSlice(MESSAGE_SHORT);
        }

        break;

    default:

        return null;
    }

    return null;
}

---

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    while (buf.isReadable() && buf.getByte(buf.readerIndex()) != '$') {
        buf.skipBytes(1);/*from  www .  jav a  2s  .c om*/
    }

    int delimiterIndex = BufferUtil.indexOf("\r\n", buf);
    if (delimiterIndex > MINIMUM_LENGTH) {
        return readFrame(buf, delimiterIndex, 2);
    } else {
        delimiterIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
        if (delimiterIndex > MINIMUM_LENGTH) {
            if (buf.writerIndex() > delimiterIndex + 1 && buf.getByte(delimiterIndex + 1) == '*') {
                delimiterIndex += 1;
            }
            if (buf.getByte(delimiterIndex - 2) == ',') {
                return readFrame(buf, delimiterIndex - 1, 2); // skip binary checksum
            } else {
                return readFrame(buf, delimiterIndex, 1);
            }
        }
    }

    return null;
}

---

From source file:org.traccar.protocol.Jt600FrameDecoder.java

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.readableBytes() < 10) {
        return null;
    }//w w w.ja va2  s.c om

    char type = (char) buf.getByte(buf.readerIndex());

    if (type == '$') {
        boolean longFormat = buf.getUnsignedByte(buf.readerIndex() + 1) == 0x75;
        int length = buf.getUnsignedShort(buf.readerIndex() + (longFormat ? 8 : 7)) + 10;
        if (length <= buf.readableBytes()) {
            return buf.readRetainedSlice(length);
        }
    } else if (type == '(') {
        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ')');
        if (endIndex != -1) {
            return buf.readRetainedSlice(endIndex + 1);
        }
    } else {
        throw new ParseException(null, 0); // unknown message
    }

    return null;
}

---

From source file:org.traccar.protocol.Jt600ProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;
    char first = (char) buf.getByte(0);

    if (first == '$') {
        return decodeBinary(buf, channel, remoteAddress);
    } else if (first == '(') {
        String sentence = buf.toString(StandardCharsets.US_ASCII);
        if (sentence.contains("W01")) {
            return decodeW01(sentence, channel, remoteAddress);
        } else {/*from w  w  w.j a  v  a2s.  c o m*/
            return decodeU01(sentence, channel, remoteAddress);
        }
    }

    return null;
}

---

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