assertEquals("unexpected EOF reading netbios session header", exception.getMessage());
    }

    @Test
    @DisplayName("readPacketType should throw IOException on incomplete header")
    void testReadPacketTypeIncompleteHeader() {
        byte[] headerData = { (byte) 0x81, (byte) 0x00 }; // Only 2 bytes instead of 4
        ByteArrayInputStream bais = new ByteArrayInputStream(headerData);
        byte[] buffer = new byte[10];