Internet RFC/STD/FYI/BCP Archives
Alternate Formats: rfc532.txt | rfc532.txt.pdf
Network Working Group R. Merryman
Request for Comments: 532 UCSD-CC
NIC: 17451 12 July 1973
The UCSD-CC Server-FTP Facility
1.0 Introduction
The UCSD Computer Center is a service site that must support itself
by charging for the usage of its facilities. Because of this, the
prospective user of our Server-FTP must supply a valid usercode
(USER) and password (PASS) before any further FTP commands are
accepted.
Through FTP, you are allowed to access or store files on our disk or
on any of our 7 or 9-track tape drives. Each individual file
transfer is handled by a separate process on the B6700 and the user
is charged for the processor, I/O, core, and (if any) tape charges
incurred by this process (note that these charges are quite minimal).
Each of these transfer processes is given a separate "job" number and
is therefore billed separately for each transfer by our accounting
system.
Please note that we have implemented FTP as defined in RFC# 354 (July
8, 1972) except as noted.
2.0 FTP Commands
(1) USER
As mentioned, you must supply a legal, known, UCSD--CC user-code.
Following which, the "230" message will be given, asking for the
corresponding password.
(2) PASS
After the 'USER' command is accepted, you must then enter the PASS
command giving the corresponding password. If the usercode and
password are of correct form, if they match, if there is money in
your account, if your account is active, and if you are authorized
for "Q1" service, then you will be properly logged-on and the
"230" response will be returned.
(3) BYTE
We allow only the (default) byte-size of "8" - all others will be
rejected.
(4) MODE
We only allow the (default) mode of "S" (Stream) - all others will
be rejected
(5) TYPE
We allow "A" (ASCII) and "I" (Image) types - all others will be
rejected. As in standard-FTP, "A" is default.
(6) STRU
We allow both "F" (file) and "R" (Record) structuring. Record-
structuring is meaningful only in ASCII/Stream, where CRLF is used
as End-of-Line. When using Record-structuring in a STOR to us, if
an incoming record is longer than the "MAXRECSIZE" of the
designated B6700 file, then we close the data connection, issue a
reject message, and abort the local (B6700) transfer process. If
a record of incoming data is shorter than the specified MAXRECSIZE
of the file, then the record is filled-out with blanks in type-
ASCII or with nulls (0) in type-Image. With Image, of course,
this applies only to the last record of the B6700 file. As in
standard-FTP, "F" is default.
(7) ALLO
We have taken the liberty with the FTP-protocol of using the
"ALLO" command to enable the user to designate the B6700 "file-
attributes" of his UCSD file. The FTP-standard form of ALLO is
ignored (i.e. "ALLO n", where 'n' is some integer), although a
"200" response will be returned in this case. Our "special" form
is where the ALLO verb is immediately followed by a "#", which is
in turn followed by a parenthesized list of standard B6700 file
attributes as used on B6700 "label-equate" cards. Following is an
example of this usage;
ALLO #(KIND=TAPE9,MAXRECSIZE=10,MYUSE=OUT,TITLE=XYZ)
If this form of the ALLO command is not given prior to a STOR,
then the file will have the name given prior in the STOR command
and will have the same characteristics as a standard "CANDE"
type-DATA disk file (i.e. where (MAXRECSIZE=14, BLOCKSIZE=420,
AREAS=15, AREASIZE=450)). If no special ALLO is given preceding a
RETR, then the file attributes are those of the file itself as it
exists on the disk and are not altered. In cases where the
special ALLO is given prior to a transfer, the name of the file is
determined by the TITLE attribute and the name given as the
pathname of the STOR or RETR command is ignored. If no TITLE is
specified in an ALLO, then the internal filename of "LOCALFILE" is
used. With the "file-attribute-list" form of the ALLO command,
the user has much of the same liberty to govern file
characteristics as he does in using a "label-equate" card with a
normal B6700 job. For information concerning the available file
attributes and their possible values, please contact the UCSD-CC
consultant. Additionally, you must remember that when doing a
STOR to a tape at UCSD, you must specify MYUSE=OUT in the file-
attribute list of the ALLO command. Also, when transferring to or
from tapes at UCSD, you must make prior arrangements with our
operators (over TELNET) to locate and mount the tape. We will
soon implement a means whereby you may communicate with the
operators directly through FTP.
(8) XLINE
This special command sets Record-structuring in our Server-FTP
without the foreign user having to use a STRU R command (which may
be rejected by his own host system). This is specifically useful
when transferring text files between UCSD and TENEX's (which do
not implement Record-structuring) - i.e., if we are sending, we
will append CRLF's to the end of each line of text (we do not
store these in the file) and will store a line upon receiving data
when a CRLF is seen, stripping the CRLF. Entering "XLINE OFF"
will restore File-structuring on our end.
(9) RETR , STOR
As specified in standard-FTP except as modified by the "special"
ALLO command (see part (7)).
(10) APPE
Not implemented at this time, but will be in near future.
(11) DELE , RNTO , RNFR
Not implemented. It is suggested that to perform these functions,
the user log to our TELNET server ("CANDE"), invoke the "LIBMAINT"
program (simply type LIBMAINT), and say;
REMOVE file-name
or
CHANGE file-name-1 TO file-name-2
Say BYE in order to exit LIBMAINT.
(12) ABOR, BYE
As specified in standard-FTP; except that, until further notice, a
BYE given while a transfer is in progress will not be queued for
action following the transfer.
Any commands not mentioned above are not yet implemented.
[This RFC was put into machine readable form for entry]
[into the online RFC archives by Helene Morin, Via Genie, 12/1999]