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.KhdProtocolDecoder.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(); // size

    if (type == MSG_LOGIN || type == MSG_ADMIN_NUMBER || type == MSG_SEND_TEXT || type == MSG_SMS_ALARM_SWITCH
            || type == MSG_POSITION_REUPLOAD) {

        ByteBuf response = Unpooled.buffer();
        response.writeByte(0x29);// w  ww . j av  a  2  s. c o  m
        response.writeByte(0x29); // header
        response.writeByte(MSG_CONFIRMATION);
        response.writeShort(5); // size
        response.writeByte(buf.getByte(buf.writerIndex() - 2));
        response.writeByte(type);
        response.writeByte(buf.writerIndex() > 9 ? buf.getByte(9) : 0); // 10th byte
        response.writeByte(Checksum.xor(response.nioBuffer()));
        response.writeByte(0x0D); // ending

        if (channel != null) {
            channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
        }

    }

    if (type == MSG_ON_DEMAND || type == MSG_POSITION_UPLOAD || type == MSG_POSITION_REUPLOAD
            || type == MSG_ALARM || type == MSG_REPLY || type == MSG_PERIPHERAL) {

        Position position = new Position(getProtocolName());

        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, readSerialNumber(buf));
        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));
        position.setValid((buf.readUnsignedByte() & 0x80) != 0);

        if (type != MSG_ALARM) {

            position.set(Position.KEY_ODOMETER, buf.readUnsignedMedium());
            position.set(Position.KEY_STATUS, buf.readUnsignedInt());
            position.set(Position.KEY_HDOP, buf.readUnsignedByte());
            position.set(Position.KEY_VDOP, buf.readUnsignedByte());
            position.set(Position.KEY_SATELLITES, buf.readUnsignedByte());

            buf.skipBytes(5); // other location data

            if (type == MSG_PERIPHERAL) {

                buf.readUnsignedShort(); // data length

                int dataType = buf.readUnsignedByte();

                buf.readUnsignedByte(); // content length

                switch (dataType) {
                case 0x01:
                    position.set(Position.KEY_FUEL_LEVEL,
                            buf.readUnsignedByte() * 100 + buf.readUnsignedByte());
                    break;
                case 0x02:
                    position.set(Position.PREFIX_TEMP + 1,
                            buf.readUnsignedByte() * 100 + buf.readUnsignedByte());
                    break;
                default:
                    break;
                }

            }

        }

        return position;

    }

    return null;
}

---

From source file:org.traccar.protocol.L100FrameDecoder.java

License:Apache License

private Object decodeOld(ByteBuf buf) {

    int header = buf.getByte(buf.readerIndex());
    boolean obd = header == 'L' || header == 'H';

    int index;// w  w w. j  a va  2 s . c  o  m
    if (obd) {
        index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
    } else {
        index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x02);
        if (index < 0) {
            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x04);
            if (index < 0) {
                return null;
            }
        }
    }

    index += 2; // checksum

    if (buf.writerIndex() >= index) {
        if (!obd) {
            buf.skipBytes(2); // header
        }
        ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex() - 2);
        buf.skipBytes(2); // footer
        return frame;
    }

    return null;
}

---

From source file:org.traccar.protocol.M2mProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    // Remove offset
    for (int i = 0; i < buf.readableBytes(); i++) {
        int b = buf.getByte(i);
        if (b != 0x0b) {
            buf.setByte(i, b - 0x20);//w w w. j ava  2 s.  c o m
        }
    }

    if (firstPacket) {

        firstPacket = false;

        StringBuilder imei = new StringBuilder();
        for (int i = 0; i < 8; i++) {
            int b = buf.readByte();
            if (i != 0) {
                imei.append(b / 10);
            }
            imei.append(b % 10);
        }

        getDeviceSession(channel, remoteAddress, imei.toString());

    } else {

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

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

        DateBuilder dateBuilder = new DateBuilder().setDay(buf.readUnsignedByte() & 0x3f)
                .setMonth(buf.readUnsignedByte() & 0x3f).setYear(buf.readUnsignedByte())
                .setHour(buf.readUnsignedByte() & 0x3f).setMinute(buf.readUnsignedByte() & 0x7f)
                .setSecond(buf.readUnsignedByte() & 0x7f);
        position.setTime(dateBuilder.getDate());

        int degrees = buf.readUnsignedByte();
        double latitude = buf.readUnsignedByte();
        latitude += buf.readUnsignedByte() / 100.0;
        latitude += buf.readUnsignedByte() / 10000.0;
        latitude /= 60;
        latitude += degrees;

        int b = buf.readUnsignedByte();

        degrees = (b & 0x7f) * 100 + buf.readUnsignedByte();
        double longitude = buf.readUnsignedByte();
        longitude += buf.readUnsignedByte() / 100.0;
        longitude += buf.readUnsignedByte() / 10000.0;
        longitude /= 60;
        longitude += degrees;

        if ((b & 0x80) != 0) {
            longitude = -longitude;
        }
        if ((b & 0x40) != 0) {
            latitude = -latitude;
        }

        position.setValid(true);
        position.setLatitude(latitude);
        position.setLongitude(longitude);
        position.setSpeed(buf.readUnsignedByte());

        int satellites = buf.readUnsignedByte();
        if (satellites == 0) {
            return null; // cell information
        }
        position.set(Position.KEY_SATELLITES, satellites);

        // decode other data

        return position;

    }

    return null;
}

---

From source file:org.traccar.protocol.MegastekFrameDecoder.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. j a va  2  s . c  o m

    if (Character.isDigit(buf.getByte(buf.readerIndex()))) {
        int length = 4 + Integer.parseInt(buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII));
        if (buf.readableBytes() >= length) {
            return buf.readRetainedSlice(length);
        }
    } else {
        while (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n') {
            buf.skipBytes(1);
        }
        int delimiter = BufferUtil.indexOf("\r\n", buf);
        if (delimiter == -1) {
            delimiter = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '!');
        }
        if (delimiter != -1) {
            ByteBuf result = buf.readRetainedSlice(delimiter - buf.readerIndex());
            buf.skipBytes(1);
            return result;
        }
    }

    return null;
}

---

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

License:Apache License

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

    if (buf.getByte(buf.readerIndex()) == 0x7F) {
        return buf.readRetainedSlice(1); // keep alive
    }/*from   w w w.  ja va2 s.  com*/

    if (ctx != null && flexDataSize == 0) {
        NavisProtocolDecoder protocolDecoder = BasePipelineFactory.getHandler(ctx.pipeline(),
                NavisProtocolDecoder.class);
        if (protocolDecoder != null) {
            flexDataSize = protocolDecoder.getFlexDataSize();
        }
    }

    if (flexDataSize > 0) {

        if (buf.readableBytes() > FLEX_HEADER_LENGTH) {
            int length = 0;
            String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
            switch (type) {
            // FLEX 1.0
            case "~A":
                length = flexDataSize * buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH) + 1 + 1;
                break;
            case "~T":
                length = flexDataSize + 4 + 1;
                break;
            case "~C":
                length = flexDataSize + 1;
                break;
            // FLEX 2.0 (Extra packages)
            case "~E":
                length++;
                for (int i = 0; i < buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH); i++) {
                    if (buf.readableBytes() > FLEX_HEADER_LENGTH + length + 1) {
                        length += buf.getUnsignedShort(length + FLEX_HEADER_LENGTH) + 2;
                    } else {
                        return null;
                    }
                }
                length++;
                break;
            case "~X":
                length = buf.getUnsignedShortLE(buf.readerIndex() + FLEX_HEADER_LENGTH) + 4 + 1;
                break;
            default:
                return null;
            }

            if (buf.readableBytes() >= FLEX_HEADER_LENGTH + length) {
                return buf.readRetainedSlice(buf.readableBytes());
            }
        }

    } else {

        if (buf.readableBytes() < NTCB_HEADER_LENGTH) {
            return null;
        }

        int length = NTCB_HEADER_LENGTH + buf.getUnsignedShortLE(buf.readerIndex() + NTCB_LENGTH_OFFSET);
        if (buf.readableBytes() >= length) {
            return buf.readRetainedSlice(length);
        }

    }

    return null;
}

---

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

License:Apache License

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

    if (buf.getByte(buf.readerIndex()) == 0x7F) {
        return null; // keep alive
    }//from  www .ja  v  a2 s .  co  m

    String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
    buf.skipBytes(type.length());

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
    if (deviceSession != null) {
        switch (type) {
        // FLEX 1.0
        case "~A":
            return processFlexArray(this::parseFlexPosition, type, deviceSession, channel, buf);
        case "~T":
        case "~C":
            return processFlexSingle(this::parseFlexPosition, type, deviceSession, channel, buf);
        // FLEX 2.0 (extra packages)
        case "~E":
            return processFlexArray(this::parseFlex20Position, type, deviceSession, channel, buf);
        case "~X":
            return processFlexSingle(this::parseFlex20Position, type, deviceSession, channel, buf);
        default:
            break;
        }
    }

    return null;
}

---

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

License:Apache License

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

    FullHttpRequest request = (FullHttpRequest) msg;
    String uri = request.uri();/* w  w  w.  j a va2  s .  co  m*/

    if (uri.startsWith("/config")) {

        sendResponse(channel, "CONFIG: OK");

    } else if (uri.startsWith("/addlog")) {

        sendResponse(channel, "ADDLOG: OK");

    } else if (uri.startsWith("/inform")) {

        sendResponse(channel, "INFORM: OK");

    } else if (uri.startsWith("/bingps")) {

        sendResponse(channel, "BINGPS: OK");

        QueryStringDecoder decoder = new QueryStringDecoder(request.uri());
        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress,
                decoder.parameters().get("imei").get(0));
        if (deviceSession == null) {
            return null;
        }

        List<Position> positions = new LinkedList<>();
        ByteBuf buf = request.content();

        while (buf.readableBytes() > 2) {

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

            if (type == MSG_GPS || type == MSG_GPS_SENSORS) {

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

                DateBuilder dateBuilder = new DateBuilder().setDay(buf.readUnsignedByte())
                        .setMonth(buf.getByte(buf.readerIndex()) & 0x0f)
                        .setYear(2010 + (buf.readUnsignedByte() >> 4))
                        .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
                position.setTime(dateBuilder.getDate());

                double latitude = buf.readUnsignedByte();
                latitude += buf.readUnsignedByte() / 60.0;
                latitude += buf.readUnsignedByte() / 6000.0;
                latitude += buf.readUnsignedByte() / 600000.0;

                double longitude = buf.readUnsignedByte();
                longitude += buf.readUnsignedByte() / 60.0;
                longitude += buf.readUnsignedByte() / 6000.0;
                longitude += buf.readUnsignedByte() / 600000.0;

                int flags = buf.readUnsignedByte();
                if (BitUtil.check(flags, 0)) {
                    latitude = -latitude;
                }
                if (BitUtil.check(flags, 1)) {
                    longitude = -longitude;
                }
                position.setLatitude(latitude);
                position.setLongitude(longitude);

                int satellites = buf.readUnsignedByte();
                position.set(Position.KEY_SATELLITES, satellites);
                position.setValid(satellites >= 3);

                position.setSpeed(buf.readUnsignedByte());

                double course = buf.readUnsignedByte() << 1;
                course += (flags >> 2) & 1;
                course += buf.readUnsignedByte() / 100.0;
                position.setCourse(course);

                if (type == MSG_GPS_SENSORS) {
                    double power = buf.readUnsignedByte();
                    power += buf.readUnsignedByte() << 8;
                    position.set(Position.KEY_POWER, power * 0.01);

                    double battery = buf.readUnsignedByte();
                    battery += buf.readUnsignedByte() << 8;
                    position.set(Position.KEY_BATTERY, battery * 0.01);

                    buf.skipBytes(6);
                }

                positions.add(position);

            } else if (type == MSG_EVENTS) {

                buf.skipBytes(13);
            }
        }

        return positions;
    }

    return null;
}

---

From source file:org.traccar.protocol.Pt502FrameDecoder.java

License:Apache License

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

    if (buf.readableBytes() < 10) {
        return null;
    }/*from ww w  . j  a  v a 2 s .  c o  m*/

    if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf
            && buf.toString(buf.readerIndex() + BINARY_HEADER, 4, StandardCharsets.US_ASCII).equals("$PHD")) {

        int length = buf.getUnsignedShortLE(buf.readerIndex() + 3);
        if (buf.readableBytes() >= length) {
            buf.skipBytes(BINARY_HEADER);
            ByteBuf result = buf.readRetainedSlice(length - BINARY_HEADER - 2);
            buf.skipBytes(2); // line break
            return result;
        }

    } else {

        if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf) {
            buf.skipBytes(BINARY_HEADER);
        }

        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r');
        if (index < 0) {
            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\n');
        }

        if (index > 0) {
            ByteBuf result = buf.readRetainedSlice(index - buf.readerIndex());
            while (buf.isReadable()
                    && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
                buf.skipBytes(1);
            }
            return result;
        }

    }

    return null;
}

---

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

License:Apache License

private void decodeSerial(Channel channel, SocketAddress remoteAddress, Position position, ByteBuf buf) {

    getLastLocation(position, null);/*from   ww  w . j  a  va  2 s.  c om*/

    int type = buf.readUnsignedByte();
    if (type == 0x0D) {

        buf.readInt(); // length
        int subtype = buf.readUnsignedByte();
        if (subtype == 0x01) {

            long photoId = buf.readUnsignedInt();
            ByteBuf photo = Unpooled.buffer(buf.readInt());
            photos.put(photoId, photo);
            sendImageRequest(channel, remoteAddress, photoId, 0, Math.min(IMAGE_PACKET_MAX, photo.capacity()));

        } else if (subtype == 0x02) {

            long photoId = buf.readUnsignedInt();
            buf.readInt(); // offset
            ByteBuf photo = photos.get(photoId);
            photo.writeBytes(buf, buf.readUnsignedShort());
            if (photo.writableBytes() > 0) {
                sendImageRequest(channel, remoteAddress, photoId, photo.writerIndex(),
                        Math.min(IMAGE_PACKET_MAX, photo.writableBytes()));
            } else {
                String uniqueId = Context.getIdentityManager().getById(position.getDeviceId()).getUniqueId();
                photos.remove(photoId);
                try {
                    position.set(Position.KEY_IMAGE,
                            Context.getMediaManager().writeFile(uniqueId, photo, "jpg"));
                } finally {
                    photo.release();
                }
            }

        }

    } else {

        position.set(Position.KEY_TYPE, type);

        int length = buf.readInt();
        boolean readable = true;
        for (int i = 0; i < length; i++) {
            byte b = buf.getByte(buf.readerIndex() + i);
            if (b < 32 && b != '\r' && b != '\n') {
                readable = false;
                break;
            }
        }

        if (readable) {
            position.set(Position.KEY_RESULT, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
        } else {
            position.set(Position.KEY_RESULT, ByteBufUtil.hexDump(buf.readSlice(length)));
        }
    }
}

---

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

License:Apache License

private int findHeader(ByteBuf buffer) {
    int guessedIndex = buffer.indexOf(buffer.readerIndex(), buffer.writerIndex(), (byte) '$');
    while (guessedIndex != -1 && buffer.writerIndex() - guessedIndex >= 5) {
        if (buffer.getByte(guessedIndex + 4) == ',' && isLetter(buffer.getByte(guessedIndex + 1))
                && isLetter(buffer.getByte(guessedIndex + 2)) && isLetter(buffer.getByte(guessedIndex + 3))) {
            return guessedIndex;
        }//from   w  w w .  j a  va 2  s .  c  o m
        guessedIndex = buffer.indexOf(guessedIndex, buffer.writerIndex(), (byte) '$');
    }
    return -1;
}

---

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