Example usage for io.netty.buffer ByteBuf writerIndex

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

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Introduction

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

Prototype

public abstract int writerIndex();

Source Link

Document

Returns the writerIndex of this buffer.

Usage

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

License:Apache License

private void sendResponse(Channel channel, SocketAddress remoteAddress, int version, ByteBuf id, short type,
        ByteBuf content) {/*from  w  w w .  j a v  a  2  s  .c  om*/

    if (channel != null) {
        int length = 2 + 2 + 1 + id.readableBytes() + 2 + 2 + 2;
        if (content != null) {
            length += content.readableBytes();
        }

        ByteBuf response = Unpooled.buffer(length);
        response.writeByte('@');
        response.writeByte('@');
        response.writeShortLE(length);
        response.writeByte(version);
        response.writeBytes(id);
        response.writeShort(type);
        if (content != null) {
            response.writeBytes(content);
            content.release();
        }
        response.writeShortLE(
                Checksum.crc16(Checksum.CRC16_X25, response.nioBuffer(0, response.writerIndex())));
        response.writeByte(0x0D);
        response.writeByte(0x0A);
        channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
    }
}

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

License:Apache License

private void sendResponse(Channel channel, SocketAddress remoteAddress, ByteBuf id, short type) {

    if (channel != null) {
        int length = 2 + 2 + id.readableBytes() + 2 + 4 + 8 + 2 + 2;

        ByteBuf response = Unpooled.buffer(length);
        response.writeByte('@');
        response.writeByte('@');
        response.writeShortLE(length);//from   w w  w. ja v  a2s .co  m
        response.writeBytes(id);
        response.writeShort(type);
        response.writeIntLE(0);
        for (int i = 0; i < 8; i++) {
            response.writeByte(0xff);
        }
        response.writeShortLE(
                Checksum.crc16(Checksum.CRC16_X25, response.nioBuffer(0, response.writerIndex())));
        response.writeByte(0x0D);
        response.writeByte(0x0A);
        channel.writeAndFlush(new NetworkMessage(response, remoteAddress));
    }
}

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

License:Apache License

private ByteBuf encodeContent(long deviceId, int command, int data1, int data2) {

    ByteBuf buf = Unpooled.buffer(0);
    buf.writeByte('M');
    buf.writeByte('C');
    buf.writeByte('G');
    buf.writeByte('P');
    buf.writeByte(0);//from w w w  . j a v  a 2 s. c  o  m
    buf.writeIntLE(Integer.parseInt(getUniqueId(deviceId)));
    buf.writeByte(0); // command numerator
    buf.writeIntLE(0); // authentication code
    buf.writeByte(command);
    buf.writeByte(command);
    buf.writeByte(data1);
    buf.writeByte(data1);
    buf.writeByte(data2);
    buf.writeByte(data2);
    buf.writeIntLE(0); // command specific data

    byte checksum = 0;
    for (int i = 4; i < buf.writerIndex(); i++) {
        checksum += buf.getByte(i);
    }
    buf.writeByte(checksum);

    return buf;
}

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;/*from w  ww  .j  a va2 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.EskyFrameDecoder.java

License:Apache License

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

    buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 'E'));

    int endIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 'E');
    if (endIndex > 0) {
        return buf.readRetainedSlice(endIndex - buf.readerIndex());
    } else {/* w ww .  j  a v a  2s  .c o m*/
        return buf.readRetainedSlice(buf.readableBytes()); // assume full frame
    }
}

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

License:Apache License

private ByteBuf encodeText(String uniqueId, String text) {

    ByteBuf buf = Unpooled.buffer(256);

    buf.writeByte(0x01);//from ww w  . j a  v a  2 s  .  c o m
    buf.writeShortLE(uniqueId.length() + text.length() + 11);

    buf.writeByte(0x03); // imei tag
    buf.writeBytes(uniqueId.getBytes(StandardCharsets.US_ASCII));

    buf.writeByte(0x04); // device id tag
    buf.writeShortLE(0); // not needed if imei provided

    buf.writeByte(0xE0); // index tag
    buf.writeIntLE(0); // index

    buf.writeByte(0xE1); // command text tag
    buf.writeByte(text.length());
    buf.writeBytes(text.getBytes(StandardCharsets.US_ASCII));

    buf.writeShortLE(Checksum.crc16(Checksum.CRC16_MODBUS, buf.nioBuffer(0, buf.writerIndex())));

    return buf;
}

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());/*from ww w.jav  a 2  s  . 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

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

    if (buf.readableBytes() < MINIMUM_LENGTH) {
        return null;
    }/*from  www.j  a  va2 s . c om*/

    if (isBinary(buf)) {

        int length;
        switch (buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII)) {
        case "+ACK":
            length = buf.getUnsignedByte(buf.readerIndex() + 6);
            break;
        case "+INF":
        case "+BNF":
            length = buf.getUnsignedShort(buf.readerIndex() + 7);
            break;
        case "+HBD":
            length = buf.getUnsignedByte(buf.readerIndex() + 5);
            break;
        case "+CRD":
        case "+BRD":
            length = buf.getUnsignedShort(buf.readerIndex() + 6);
            break;
        default:
            length = buf.getUnsignedShort(buf.readerIndex() + 9);
            break;
        }

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

    } else {

        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '$');
        if (endIndex < 0) {
            endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
        }
        if (endIndex > 0) {
            ByteBuf frame = buf.readRetainedSlice(endIndex - buf.readerIndex());
            buf.readByte(); // delimiter
            return frame;
        }

    }

    return null;
}

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

License:Apache License

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

    int indexEnd = BufferUtil.indexOf("\r\n", buf);
    if (indexEnd != -1) {
        int indexTilde = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '~');
        if (indexTilde != -1 && indexTilde < indexEnd) {
            int length = buf.getUnsignedShortLE(indexTilde + 1);
            indexEnd = BufferUtil.indexOf("\r\n", buf, indexTilde + 2 + length, buf.writerIndex());
            if (indexEnd == -1) {
                return null;
            }//  w  w w.  j a  v a  2 s  .c  o  m
        }
        ByteBuf frame = buf.readRetainedSlice(indexEnd - buf.readerIndex());
        buf.skipBytes(2);
        return frame;
    }
    return null;
}

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

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    int indexTilde = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '~');

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);

    if (deviceSession != null && indexTilde == -1) {
        String bufString = buf.toString(StandardCharsets.US_ASCII);
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.setTime(new Date());
        getLastLocation(position, new Date());
        position.setValid(false);//  ww  w . j  a  va  2s. c om
        position.set(Position.KEY_RESULT, bufString);
        return position;
    }

    if (buf.readableBytes() < HEADER_LENGTH) {
        return null;
    }
    String header = buf.readSlice(HEADER_LENGTH).toString(StandardCharsets.US_ASCII);

    if (header.equals("+RRCB~")) {

        buf.skipBytes(2); // binary length 26
        int deviceId = buf.readUnsignedShortLE();
        deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
        if (deviceSession == null) {
            return null;
        }
        long unixTime = buf.readUnsignedIntLE();
        if (channel != null) {
            sendResponseCurrent(channel, deviceId, unixTime);
        }
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.setTime(new Date(unixTime * 1000));

        decodeStructure(buf, position);
        return position;

    } else if (header.equals("+DDAT~")) {

        buf.skipBytes(2); // binary length
        int deviceId = buf.readUnsignedShortLE();
        deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
        if (deviceSession == null) {
            return null;
        }
        byte format = buf.readByte();
        if (format != 4) {
            return null;
        }
        byte nblocks = buf.readByte();
        int packNum = buf.readUnsignedShortLE();
        if (channel != null) {
            sendResponseArchive(channel, deviceId, packNum);
        }
        List<Position> positions = new ArrayList<>();
        while (nblocks > 0) {
            nblocks--;
            long unixTime = buf.readUnsignedIntLE();
            int timeIncrement = buf.getUnsignedShortLE(buf.readerIndex() + 120);
            for (int i = 0; i < 6; i++) {
                if (buf.getUnsignedByte(buf.readerIndex()) != 0xFE) {
                    Position position = new Position(getProtocolName());
                    position.setDeviceId(deviceSession.getDeviceId());
                    position.setTime(new Date((unixTime + i * timeIncrement) * 1000));
                    decodeStructure(buf, position);
                    position.set(Position.KEY_ARCHIVE, true);
                    positions.add(position);
                } else {
                    buf.skipBytes(20); // skip filled 0xFE structure
                }
            }
            buf.skipBytes(2); // increment
        }
        return positions;

    }

    return null;
}