// SMB1 header
        validator.validateSmbHeader(0x424D53FF, 32, 0x72);

        // SMB2 header
        validator.validateSmbHeader(0x424D53FE, 64, 0x00);
    }

    @Test
    public void testInvalidProtocolId() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validateSmbHeader(0xDEADBEEF, 64, 0x00);
        });
    }

    @Test

     *
     * @param protocolId protocol identifier
     * @param structureSize structure size field
     * @param command command code
     * @throws SmbException if header is invalid
     */
    public void validateSmbHeader(int protocolId, int structureSize, int command) throws SmbException {
        totalValidations.incrementAndGet();

        // Check SMB1 signature
        if (protocolId == 0x424D53FF) { // 0xFF 'S' 'M' 'B'