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OS2FTP.DOC
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1993-02-07
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OS/2 File Transfer Protocol driver 1.5 (c) 1992 by Mikael Wahlgren
===========================================================================
This is an external file transfer protocol driver, designed to supply
other programs with file transfer capabilities. It is specially
designed with Os2You (OS/2 Remote Access Facility by Mikael Wahlgren)
and the Maximus/2 BBS program in mind.
This protocol driver supports the following file transfer protocols:
Xmodem/ChSum
Xmodem/CRC
Xmodem-1K
Ymodem (batch)
Ymodem-G (batch)
Zmodem
Kermit (*)
(*) The Kermit file transfer protocol is supported in combination with
the CKermit file transfer program (tested with CK5A188 release).
CKOKER16.EXE must be available in the PATH.
To install this program you copy all *.EXE and *.MSG in a directory
specified by your PATH and DPATH statements. You copy the ZIP.DLL
file into a directory specified by your LIBPATH statement.
Possible return codes (ERRORLEVELs)
===================================
ERR_NO_ERROR = 0
ERR_OPEN_FILE = 1
ERR_INIT_SESS = 2
ERR_DISK_READ = 3
ERR_DISK_WRITE = 4
ERR_COM_READ = 5
ERR_COM_WRITE = 6
ERR_CANCEL = 7
ERR_FATAL_COM = 8
ERR_NO_DCD = 9
ERR_LOCAL_CANCEL = 10
ERR_TIMEOUT = 255;
(these error codes are only valid for Xmodem and Ymodem family protocols.
For return codes of Zmodem and Kermit, see the M2Zmodem and CKermit
documentations)
Special instructions to run the program with Os2You
===================================================
This program is especially designed with Os2You in mind. The recommended
protocol is Ymodem, which is default. To use this protocol driver with
Os2You, just copy the files into a pathed directory and run the following
commands:
Os2FTP -sC:\Files\*.DAT (to transfer files C:\Files\*.DAT)
Os2FTP -rC:\Download (to receive files into C:\Download directory)
If you want to use another protocol, like YmodemG, the commands will look
like:
Os2FTP -YMODEMG -sC:\Files\*.DAT
Os2FTP -YMODEMG -rC:\Download
Instructions on use with BBS
============================
Copy all of the distributed files into your Maximus home directory.
To interface these protocols with the BBS (Maximus/2) you will have
to add the following lines to your PROTOCOL.CTL file:
------------------------------- cut here -----------------------
Protocol Ymodem
Type Batch
LogFile Ymodem%K.Log
ControlFile Ymodem%K.Ctl
DownloadCmd OS2FTP.Exe -nosts -s#Ymodem%K.Ctl
UploadCmd OS2FTP.Exe -nosts -r#Ymodem%K.Ctl
DownloadString Send %s
UploadString Get %s
DownloadKeyword Sent
UploadKeyword Got
FilenameWord 1
DescriptWord 0
End Protocol
Protocol G-Ymodem
Type Batch
LogFile YmodG%K.Log
ControlFile YmodG%K.Ctl
DownloadCmd OS2FTP.Exe -ymodemg -nosts -s#YmodG%K.Ctl
UploadCmd OS2FTP.Exe -ymodemg -nosts -r#YmodG%K.Ctl
DownloadString Send %s
UploadString Get %s
DownloadKeyword Sent
UploadKeyword Got
FilenameWord 1
DescriptWord 0
End Protocol
Protocol M2-Zmodem
Type Batch
LogFile M2Z%K.Log
ControlFile M2Z%K.Ctl
DownloadCmd OS2FTP.Exe -zmodem -s#M2Z%K.Ctl
UploadCmd OS2FTP.Exe -zmodem -r#M2Z%K.Ctl
DownloadString Send %s
UploadString Get %s
DownloadKeyword Z-Sent:
UploadKeyword Z-Received:
FilenameWord 1
DescriptWord 0
End Protocol
Protocol Kermit
Type Batch
LogFile KERM%K.Log
ControlFile KERM%K.Ctl
DownloadCmd OS2FTP.Exe -kermit -tmp\KERM%K -s#KERM%K.Ctl
UploadCmd OS2FTP.Exe -kermit -tmp\KERM%K -r#KERM%K.Ctl
DownloadString Send %s
UploadString Get %s
DownloadKeyword Sent
UploadKeyword Got
FilenameWord 1
DescriptWord 0
End Protocol
------------------------------- cut here -----------------------
You should also ensure that the PROTOCOL.CTL file is included in
your MAX.CTL file (i.e. ensure that the MAX.CTL file is ended with
a line like "include PROTOCOL.CTL")
The Xmodem protocols should be possible to use in this way as well, but
I can't see the use of this.
There is no guarantee that these file transfer protocols work in all
situations. Especially the Zmodem protocol is untested for this kind
of usage. I am not legally responsible for any harm that your system
may suffer from, by the use of this program.
NOTE that if you use the Kermit protocol, the CKOKER16.EXE file MUST be
available in the PATH (it is _NOT_ sufficient that it is in the current
directory!). This version of OS2FTP is built to work together with
CKermit version 5A188 released 25 January 1993. The CKermit package
includes two different Kermit implementations CKOKER16.EXE for 16 or 32-
bit OS/2 and CKOKER32.EXE for 32-bit OS/2. HOWEVER there seems to be
a serious bug in CKOKER32.EXE (the 32-bit version) which prevents it
from working for this kind of use. OS2FTP is built to first look for
CKOKER32.EXE and if that can't be loaded try with CKOKER16.EXE. Thus
I recommend you to REMOVE CKOKER32.EXE and ensure that ONLY CKOKER16.EXE
is available. This as long as the bug in the 32-bit implementation
remains unfixed. Also note that becuase the Kermit protocol is
implemented using an external program, there are some limitations with
regard to this. These limitations are (when using Kermit protocols):
* All files are transfered to/from a temporary directory created by
OS2FTP. This directory will normally be maintained automaticly
by OS2FTP. This means that if a user request a file transfer batch
of 3.5 Mbytes to/from the system, this will require 3.5 Mb of temporary
disk space.
* If a user cancels a Kermit download, the BBS will still treat this as
a completed download (when adding to the download counters and so on).
* The Kermit protocol can not be aborted by pressing Ctrl-X several
times, as stated by Maximus before a file transfer begins.
Programming information
=======================
If you want to use OS2FTP with your own application you can easily interface
to OS2FTP. To send files with XModem, Ymodem, Ymodem-G, Zmodem or Kermit
from your application, you create a text file (let's call it OUT.TXT) like
this:
Send C:\MyPath\MyFile.TXT
Send C:\MyPath\Package.ZIP
Send C:\Another\Demo.TXT
To start the file transfer you invoke OS2FTP with the following command:
For Xmodem: OS2FTP -xmodem -nosts -s#OUT.TXT
For Ymodem: OS2FTP -nosts -s#OUT.TXT
For Ymodem: OS2FTP -ymodemg -nosts -s#OUT.TXT
For Zmodem: OS2FTP -zmodem -s#OUT.TXT
For Kermit: OS2FTP -kermit -tmp\TMPDIR -s#OUT.TXT
To receive files with Xmodem, Ymodem, Ymodem-G, Zmodem or Kermit to your
application (into the directory C:\InPath you create a text file (let's
call it IN.TXT) like this:
Get C:\InPath
To start the receive you invoke OS2FTP with the following command:
For Xmodem: OS2FTP -xmodem -nosts -r#IN.TXT
For Ymodem: OS2FTP -nosts -r#IN.TXT
For Xmodem: OS2FTP -ymodemg -nosts -r#IN.TXT
For Zmodem: OS2FTP -zmodem -r#IN.TXT
For Xmodem: OS2FTP -kermit -tmp\TMPDIR -r#IN.TXT
After a successful transfer a log file will be created called OUT.LOG
(if the filename OUT.TXT was used) or IN.LOG (if the filename IN.TXT
was used). If the file transfer operation was done with Xmodem, Ymodem
or Kermit each row in the log file should be scanned for the following
keywords (there is no guarantee that the keyword will be placed first on
the row):
Sent yyy\xxx (yyy\xxx is the complete path to file received)
Got yyy\xxx ( d:o )
If the file transfer was performed using Zmodem, the keywords are:
Z-Sent: yyy\xxx (yyy\xxx is the complete path to file received)
Z-Received: yyy\xxx ( d:o )
The log file should be erased before using OS2FTP again.
Release log
===========
1.3 Modified for BBS usage
1.4 Ymodem-G transfers can now be cancelled correctly with Ctrl-X.
Ymodem-G didn't detect carrier loss, this is fixed.
Kermit protocol added.
1.5 Kermit handling modified to work with CKermit 5A188 from
25 January 1993.
Licensing information
=====================
If you haven't registered the Os2You/M2Zmodem/OS2FTP file transfer option,
this program will introduce an intentional delay before transfering any
files. Note that the Ymodem protocol used in this protocol driver is exactly
the same driver that is built in Os2You, available via the Service functions
menu.
To register, use the included order form and specify the
Os2You/M2Zmodem/OS2FTP item.
Mikael Wahlgren