INT 21 - Novell NetWare v3+ - GET CONNECTIONS USING A FILE
        AX = F217h subfn ECh
        CX = length of request buffer in bytes
        DX = length of reply buffer in bytes
        DS:SI -> request buffer (see below)
        ES:DI -> reply buffer (see below)
Return: AL = status
        reply buffer filled

Format of request buffer:
Offset  Size    Description
 00h    WORD    0009h (length of following data)
 02h    BYTE    ECh (subfunction "Get Connections Using a File")
 03h    BYTE    data stream type
 04h    BYTE    volume number
 05h    DWORD   directory entry number
 09h    WORD    last record seen (0000h for first call)

Format of reply buffer:
Offset  Size    Description
 00h    WORD    next request record
 02h    WORD    use count
 04h    WORD    open count
 06h    WORD    number of times open for reading
 08h    WORD    number of times open for writing
 0Ah    WORD    Deny Read count
 0Ch    WORD    Deny Write count
 0Eh    BYTE    flag: locked
 0Fh    BYTE    data stream type
 10h    WORD    number of records returned (max 70)
 12h 7N BYTEs   returned records
                Offset  Size    Description
                 00h    WORD    connection number
                 02h    WORD    task number
                 04h    BYTE    lock type
                 05h    BYTE    access flag
                 06h    BYTE    lock flag

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