Exemplo n.º 1
0
  @Override
  protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg)
      throws Exception {

    ChannelBuffer buf = (ChannelBuffer) msg;

    // Find type
    Integer index = ChannelBufferTools.find(buf, 0, buf.readableBytes(), ",");
    index = ChannelBufferTools.find(buf, index + 1, buf.readableBytes(), ",");

    String type = buf.toString(index + 1, 3, Charset.defaultCharset());
    if (type.equals("CCC")) {
      return decodeBinaryMessage(channel, buf);
    } else {
      return decodeRegularMessage(channel, buf);
    }
  }
Exemplo n.º 2
0
  @Override
  protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg)
      throws Exception {

    ChannelBuffer buf = (ChannelBuffer) msg;

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

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

      // Create new position
      Position position = new Position();
      position.setProtocol(getProtocolName());

      // Device identification
      if (!identify(readSerialNumber(buf), channel)) {
        return null;
      }
      position.setDeviceId(getDeviceId());

      // Date and time
      Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
      time.clear();
      time.set(Calendar.YEAR, 2000 + ChannelBufferTools.readHexInteger(buf, 2));
      time.set(Calendar.MONTH, ChannelBufferTools.readHexInteger(buf, 2) - 1);
      time.set(Calendar.DAY_OF_MONTH, ChannelBufferTools.readHexInteger(buf, 2));
      time.set(Calendar.HOUR_OF_DAY, ChannelBufferTools.readHexInteger(buf, 2));
      time.set(Calendar.MINUTE, ChannelBufferTools.readHexInteger(buf, 2));
      time.set(Calendar.SECOND, ChannelBufferTools.readHexInteger(buf, 2));
      position.setTime(time.getTime());

      // Location
      position.setLatitude(ChannelBufferTools.readCoordinate(buf));
      position.setLongitude(ChannelBufferTools.readCoordinate(buf));
      position.setSpeed(UnitsConverter.knotsFromKph(ChannelBufferTools.readHexInteger(buf, 4)));
      position.setCourse(ChannelBufferTools.readHexInteger(buf, 4));

      // Flags
      int flags = buf.readUnsignedByte();
      position.setValid((flags & 0x80) != 0);

      if (type == MSG_ALARM) {

        buf.skipBytes(2);

      } else {

        // Odometer
        position.set(Event.KEY_ODOMETER, buf.readUnsignedMedium());

        // Status
        buf.skipBytes(4);

        // Other
        buf.skipBytes(8);
      }

      // TODO: parse extra data
      return position;
    } else if (type == MSG_LOGIN && channel != null) {

      buf.skipBytes(4); // serial number
      buf.readByte(); // reserved

      ChannelBuffer response = ChannelBuffers.dynamicBuffer();
      response.writeByte(0x29);
      response.writeByte(0x29); // header
      response.writeByte(MSG_CONFIRMATION);
      response.writeShort(5); // size
      response.writeByte(buf.readUnsignedByte());
      response.writeByte(type);
      response.writeByte(0); // reserved
      response.writeByte(Crc.xorChecksum(response.toByteBuffer()));
      response.writeByte(0x0D); // ending
      channel.write(response);
    }

    return null;
  }
Exemplo n.º 3
0
  private Position decodeNormalMessage(
      ChannelBuffer buf, Channel channel, SocketAddress remoteAddress) {

    Position position = new Position();
    position.setProtocol(getProtocolName());

    buf.readByte(); // header

    String id = String.valueOf(Long.parseLong(ChannelBuffers.hexDump(buf.readBytes(5))));
    if (!identify(id, channel, remoteAddress)) {
      return null;
    }
    position.setDeviceId(getDeviceId());

    int version = ChannelBufferTools.readHexInteger(buf, 1);
    buf.readUnsignedByte(); // type
    buf.readBytes(2); // length

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

    double latitude = convertCoordinate(ChannelBufferTools.readHexInteger(buf, 8));
    double longitude = convertCoordinate(ChannelBufferTools.readHexInteger(buf, 9));

    byte flags = buf.readByte();
    position.setValid((flags & 0x1) == 0x1);
    if ((flags & 0x2) == 0) {
      latitude = -latitude;
    }
    position.setLatitude(latitude);
    if ((flags & 0x4) == 0) {
      longitude = -longitude;
    }
    position.setLongitude(longitude);

    position.setSpeed(ChannelBufferTools.readHexInteger(buf, 2));
    position.setCourse(buf.readUnsignedByte() * 2.0);

    if (version == 1) {

      position.set(Event.KEY_SATELLITES, buf.readUnsignedByte());
      position.set(Event.KEY_POWER, buf.readUnsignedByte());

      buf.readByte(); // other flags and sensors

      position.setAltitude(buf.readUnsignedShort());

      int cid = buf.readUnsignedShort();
      int lac = buf.readUnsignedShort();
      if (cid != 0 && lac != 0) {
        position.set(Event.KEY_CID, cid);
        position.set(Event.KEY_LAC, lac);
      }

      position.set(Event.KEY_GSM, buf.readUnsignedByte());

    } else if (version == 2) {

      int fuel = buf.readUnsignedByte() << 8;

      position.set(Event.KEY_STATUS, buf.readUnsignedInt());
      position.set(Event.KEY_ODOMETER, buf.readUnsignedInt());

      fuel += buf.readUnsignedByte();
      position.set(Event.KEY_FUEL, fuel);
    }

    return position;
  }
Exemplo n.º 4
0
  private List<Position> decodeBinaryMessage(Channel channel, ChannelBuffer buf) {
    List<Position> positions = new LinkedList<>();

    String flag = buf.toString(2, 1, Charset.defaultCharset());
    int index = ChannelBufferTools.find(buf, 0, buf.readableBytes(), ",");

    // Identification
    String imei = buf.toString(index + 1, 15, Charset.defaultCharset());
    if (!identify(imei, channel)) {
      return null;
    }

    buf.skipBytes(index + 1 + 15 + 1 + 3 + 1 + 2 + 2 + 4);

    while (buf.readableBytes() >= 0x34) {

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

      // Event
      position.set(Event.KEY_EVENT, buf.readUnsignedByte());

      // Location
      position.setLatitude(buf.readInt() * 0.000001);
      position.setLongitude(buf.readInt() * 0.000001);

      // Time (946684800 - timestamp for 2000-01-01)
      position.setTime(new Date((946684800 + buf.readUnsignedInt()) * 1000));

      // Validity
      position.setValid(buf.readUnsignedByte() == 1);

      // Satellites
      position.set(Event.KEY_SATELLITES, buf.readUnsignedByte());

      // GSM Signal
      position.set(Event.KEY_GSM, buf.readUnsignedByte());

      // Speed
      position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedShort()));

      // Course
      position.setCourse(buf.readUnsignedShort());

      // HDOP
      position.set(Event.KEY_HDOP, buf.readUnsignedShort() * 0.1);

      // Altitude
      position.setAltitude(buf.readUnsignedShort());

      // Other
      position.set(Event.KEY_ODOMETER, buf.readUnsignedInt());
      position.set("runtime", buf.readUnsignedInt());
      position.set(
          Event.KEY_CELL,
          buf.readUnsignedShort()
              + "|"
              + buf.readUnsignedShort()
              + "|"
              + buf.readUnsignedShort()
              + "|"
              + buf.readUnsignedShort());
      position.set(Event.KEY_STATUS, buf.readUnsignedShort());

      // ADC
      position.set(Event.PREFIX_ADC + 1, buf.readUnsignedShort());
      position.set(Event.KEY_BATTERY, buf.readUnsignedShort() * 0.01);
      position.set(Event.KEY_POWER, buf.readUnsignedShort());

      buf.readUnsignedInt(); // geo-fence
      positions.add(position);
    }

    // Delete recorded data
    if (channel != null) {
      StringBuilder command = new StringBuilder("@@");
      command.append(flag).append(27 + positions.size() / 10).append(",");
      command.append(imei).append(",CCC,").append(positions.size()).append("*");
      int checksum = 0;
      for (int i = 0; i < command.length(); i += 1) checksum += command.charAt(i);
      command.append(String.format("%02x", checksum & 0xff).toUpperCase());
      command.append("\r\n");
      channel.write(command.toString());
    }

    return positions;
  }
Exemplo n.º 5
0
  @Override
  protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg)
      throws Exception {

    ChannelBuffer buf = (ChannelBuffer) msg;

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

    if (channel != null) {
      ChannelBuffer response = ChannelBuffers.copiedBuffer("^" + index, Charset.defaultCharset());
      channel.write(response, remoteAddress);
    }

    String id = String.valueOf(buf.readUnsignedInt());
    if (!identify(id, channel, remoteAddress)) {
      return null;
    }

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

    while (buf.readableBytes() > 2) {

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

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

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

      int flags = buf.readUnsignedByte();
      position.set(Event.KEY_SATELLITES, BitUtil.range(flags, 2));
      position.setValid(BitUtil.range(flags, 0, 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(Event.KEY_IGNITION, BitUtil.check(flags, 0));
      position.set(Event.KEY_GSM, BitUtil.range(flags, 2, 3));
      position.setCourse((BitUtil.range(flags, 5) * 45 + 180) % 360);

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

      while (buf.readerIndex() < end) {

        int type = buf.readUnsignedByte();
        int length = buf.readUnsignedByte();
        if (length == 255) {
          length += buf.readUnsignedByte();
        }

        switch (type) {
          case 2:
            position.set(Event.KEY_ODOMETER, buf.readUnsignedMedium());
            break;
          case 5:
            position.set(Event.KEY_INPUT, buf.readUnsignedByte());
            break;
          case 6:
            {
              int n = buf.readUnsignedByte() >> 4;
              if (n < 2) {
                position.set(Event.PREFIX_ADC + n, readSwappedFloat(buf));
              } else {
                position.set("di" + (n - 2), readSwappedFloat(buf));
              }
            }
            break;
          case 7:
            {
              int alarm = buf.readUnsignedByte();
              buf.readUnsignedByte();
              if (BitUtil.check(alarm, 5)) {
                position.set(Event.KEY_ALARM, BitUtil.range(alarm, 0, 4));
              }
            }
            break;
          case 8:
            position.set("antihijack", buf.readUnsignedByte());
            break;
          case 9:
            position.set("authorized", ChannelBufferTools.readHexString(buf, 16));
            break;
          case 10:
            position.set("unauthorized", ChannelBufferTools.readHexString(buf, 16));
            break;
          case 24:
            {
              Set<Integer> temps = new LinkedHashSet<>();
              int temp = buf.readUnsignedByte();
              for (int i = 3; i >= 0; i--) {
                int n = (temp >> (2 * i)) & 0x03;
                if (!temps.contains(n)) {
                  temps.add(n);
                }
              }
              for (int n : temps) {
                position.set(Event.PREFIX_TEMP + n, buf.readUnsignedByte());
              }
            }
            break;
          case 28:
            position.set("weight", buf.readUnsignedShort());
            buf.readUnsignedByte();
            break;
          case 90:
            position.set(Event.KEY_POWER, readSwappedFloat(buf));
            break;
          case 101:
            position.set(Event.KEY_OBD_SPEED, buf.readUnsignedByte());
            break;
          case 102:
            position.set(Event.KEY_RPM, buf.readUnsignedByte() * 50);
            break;
          case 107:
            {
              int fuel = buf.readUnsignedShort();
              switch (fuel >> 14) {
                case 1:
                  position.set(Event.KEY_FUEL, (fuel & 0x3fff) * 0.4 + "%");
                  break;
                case 2:
                  position.set(Event.KEY_FUEL, (fuel & 0x3fff) * 0.5 + " l");
                  break;
                case 3:
                  position.set(Event.KEY_FUEL, (fuel & 0x3fff) * -0.5 + " l");
                  break;
              }
            }
            break;
          case 108:
            position.set(Event.KEY_OBD_ODOMETER, buf.readUnsignedInt() * 5);
            break;
          case 150:
            position.set("door", buf.readUnsignedByte());
            break;
          default:
            buf.skipBytes(length);
            break;
        }
      }

      positions.add(position);
    }

    return positions;
  }