Examples with InvalidAppCRCError sugar.free.sightparser.error.InvalidAppCRCError used on opensource projects

Example 1 with InvalidAppCRCError

use of sugar.free.sightparser.error.InvalidAppCRCError in project SightRemote by TebbeUbben.

the class AppLayerMessage method deserialize.

public static AppLayerMessage deserialize(ByteBuf byteBuf) throws Exception {
    byte version = byteBuf.readByte();
    byte service = byteBuf.readByte();
    short command = byteBuf.readShort();
    short error = byteBuf.readShort();
    byte[] data = byteBuf.readBytes();
    if (version != VERSION)
        throw new InvalidAppVersionError(version, VERSION);
    if (!MESSAGES.containsKey(service))
        throw new UnknownServiceError(service);
    Class<? extends AppLayerMessage> clazz = MESSAGES.get(service).get(command);
    if (clazz == null)
        throw new UnknownAppMessageError(service, command);
    if (error != 0x0000 && error != 0xF0CC) {
        Class<? extends AppErrorCodeError> errorClass = Errors.ERRORS.get(error);
        if (errorClass != null)
            throw errorClass.getConstructor(Class.class, short.class).newInstance(clazz, error);
        else
            throw new UnknownAppErrorCodeError(clazz, error);
    }
    AppLayerMessage message = clazz.newInstance();
    ByteBuf dataBuf = new ByteBuf(data.length);
    dataBuf.putBytes(data);
    if (message.inCRC()) {
        int crc = dataBuf.getUInt16LE(data.length - 2);
        byte[] bytes = dataBuf.getBytes(data.length - 2);
        int calculatedCRC = Cryptograph.calculateCRC(bytes);
        if (crc != calculatedCRC)
            throw new InvalidAppCRCError(crc, calculatedCRC);
        dataBuf = new ByteBuf(bytes.length);
        dataBuf.putBytes(bytes);
    }
    message.parse(dataBuf);
    return message;
}