}
        }
        return "unknown";
    }

    private long extractNtStatus(Throwable cause) {
        if (cause instanceof SmbException) {
            return ((SmbException) cause).getNtStatus();
        }
        return 0;
    }

    private String extractServerMessage(Throwable cause) {
        if (cause instanceof SmbException) {
            // Try to get server message from SMB exception

                log.debug(String.format("VALIDATE_NEGOTIATE_INFO response code 0x%x", e.getNtStatus()));
            }
            log.trace("VALIDATE_NEGOTIATE_INFO returned error", e);
            if (req.getResponse().isReceived() && req.getResponse().isVerifyFailed()
                    || e.getNtStatus() == NtStatus.NT_STATUS_ACCESS_DENIED) {
                // this is the signature error

        status = winerr ? errcode : getStatusByCode(errcode);
    }

    /**
     * Returns the NT status code for this exception.
     *
     * @return the NT status code
     */
    public int getNtStatus() {
        return status;
    }

    /**
     * Returns the root cause of this exception if one exists
     *
     * @return the root cause throwable, or null if none exists
     */

        this.status = winerr ? errcode : getStatusByCode(errcode);
    }

    /**
     * Get the NT STATUS code associated with this exception
     *
     * @return status code
     */
    public int getNtStatus() {
        return this.status;
    }

    /**
     * Get the root cause of this exception (deprecated - use getCause() instead)
     *
     * @return cause
     */
    @Deprecated

                            }
                        } else {
                            if (e.getNtStatus() != 0xC000035C && e.getNtStatus() != 0xC0000203 || !trans.isSMB2()) {
                                throw e;
                            }
                            if (e.getNtStatus() == 0xC0000203) { // USER_SESSION_DELETED
                                try {

                }
            } catch (final SmbAuthException sae) {
                log.warn("NtlmHttpFilter: " + ntlm.getName() + ": 0x" + jcifs.util.Hexdump.toHexString(sae.getNtStatus(), 8) + ": " + sae);
                if (sae.getNtStatus() == NtStatus.NT_STATUS_ACCESS_VIOLATION) {
                    /*
                     * Server challenge no longer valid for
                     * externally supplied password hashes.

            if (r.getStatus() == NtStatus.NT_STATUS_NO_MORE_FILES) {
                return false;
            }
            this.response = r;
        } catch (final SmbException e) {
            if (e.getNtStatus() == NtStatus.NT_STATUS_NO_MORE_FILES) {
                log.debug("End of listing", e);
                return false;
            }
            throw e;
        }
        return true;
    }

                }
            } catch (final SmbException se) {
                if (LogStream.level > 2) {
                    se.printStackTrace(log);
                }
                if (se.getNtStatus() != NtStatus.NT_STATUS_UNSUCCESSFUL) {
                    throw se;
                }
            }
            if (dirents[i].isDirectory()) {
                dirCount++;
            } else {

     */
    private boolean isRetryableException(CIFSException e) {
        if (e instanceof SmbException) {
            SmbException se = (SmbException) e;
            int status = se.getNtStatus();
            // Retry on network-related errors but not on authentication or access errors
            return status == NtStatus.NT_STATUS_CONNECTION_REFUSED || status == NtStatus.NT_STATUS_NETWORK_NAME_DELETED

                }
                file.send(request, response);
            } catch (final SmbException se) {
                if (file.type == SmbFile.TYPE_NAMED_PIPE && se.getNtStatus() == NtStatus.NT_STATUS_PIPE_BROKEN) {
                    return -1;
                }
                throw seToIoe(se);
            }
            n = response.dataLength;
            if (n <= 0) {