void testProtocolConstants() {
        assertEquals(0x0000, SmbConstants.OPEN_FUNCTION_FAIL_IF_EXISTS);
        assertEquals(0x0020, SmbConstants.OPEN_FUNCTION_OVERWRITE_IF_EXISTS);
        assertEquals(0x00, SmbConstants.SECURITY_SHARE);
        assertEquals(0x01, SmbConstants.SECURITY_USER);
        assertEquals(4, SmbConstants.CMD_OFFSET);
        assertEquals(5, SmbConstants.ERROR_CODE_OFFSET);
        assertEquals(9, SmbConstants.FLAGS_OFFSET);

            } else {
                throw new SmbException("Unsupported credential type " + (cred != null ? cred.getClass() : "NULL"));
            }
        } else if (server.security == SmbConstants.SECURITY_SHARE) {
            if (!(cred instanceof final NtlmPasswordAuthenticator a)) {
                throw new SmbException("Unsupported credential type");
            }
            this.lmHash = new byte[0];

                    ex = se;
                }

                if (!this.getConfig().isAllowGuestFallback() && response.isLoggedInAsGuest()
                        && negoResp.getServerData().security != SmbConstants.SECURITY_SHARE
                        && (!this.credentials.isGuest() && !this.credentials.isAnonymous())) {
                    throw new SmbAuthException(NtStatus.NT_STATUS_LOGON_FAILURE);
                }