Function mbedtls_version_get_string_full 

pub unsafe extern "C" fn mbedtls_version_get_string_full(
    string: *mut c_char,
)

Get the full version string (“Mbed TLS x.y.z”).

\param string The string that will receive the value. The Mbed TLS version string will use 18 bytes AT MOST including a terminating null byte. (So the buffer should be at least 18 bytes to receive this version string).