[comp.protocols.tcp-ip] data representation in FTP

dolson@ADA20.ISI.EDU (Douglas M. Olson) (07/31/87)

Tedious but trivial for people who use these documents, I hope:

I'm reading a draft test plan in order to spot whoppers and fix it up.
In some areas I'm not extremely qualified...oh well.  Problem: the
draft for testing FTP calls for transmission of data in "text, ASCII,
EBCDIC, and binary" to and from the test host, which will be a VAX/VMS
system.  Seems inspecific to me...  I'm referencing what looks like
MIL-STD 1780 page 9 (which is on page I-341 of the white books which
I DON'T really know how to use).  

"5.2.1 ASCII format: ...is intended primarily for transfer of text
files, except when both hosts would find the EBCDIC type more
convenient.  The sender converts the data from his internal format to
the standard 8-bit NVT ASCII representation..."

I'm still in trouble, but now I know its because I don't know FTP well
enough.  Question 1) When would a VAX/VMS FTP decide that EBCDIC is
convenient? That is, is this likely/mandatory to be a user-selectable
option in a reasonable FTP implementation on VMS?  Seems like the
default in this case is that if a VAX/VMS user gets a file from a
machine which uses EBCDIC, it is the remote (EBCDIC) host's job to
translate it before transmission, unless the user wants EBCDIC.

If the VMS FTP user CANNOT specify EBCDIC, then I have to tell the
test plan writers to fix this... comments from you folks anxiously
solicited!

Doug (dolson @ Ada20)

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