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- XCept Version 2.0
-
- Copyright (c) 1992, 1993 Arno Augustin, Frank Hoering, University of
- Erlangen-Nuremberg, Germany.
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
- 3. All advertising materials mentioning features or use of this software
- must display the following acknowledgement:
- This product includes software developed by the University of
- Erlangen-Nuremberg, Germany.
- 4. Neither the name of the University nor the names of its contributors
- may be used to endorse or promote products derived from this software
- without specific prior written permission.
-
- THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
- IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
- WHAT IS XCEPT?
-
- XCept is an X11 implementation of the CEPT videotext protocol terminal. It has
- been extensively tested against the German Telekom's BTX version of the CEPT
- videotext service.
-
- This is the second release of this software. We have done some bug fixes,
- added support for ISDN access (tested with BinTec boards on a Sun machine),
- sped up the X11 client, and more. As there already is a shareware package
- called XBtx (running under MS-DOS) with which we have nothing in common, we
- decided to rename our software XCept, which is quite easy to memorize for two
- reasons:
-
- o X CEPT decoder => xcept
- o We hope to have provided eXCeptionally software 8=)
-
-
- WHAT ARE XBTXs CAPABILITIES?
-
- XCept supports
-
- o color and black & white displays
- o multiple server, multiple clients (though at any given time only one
- client can be served by a server)
- o built-in script language
- o accounting (connect time and user)
- o allow files (users, machines, and user@machine)
- o session logging & off-line playback
- o saving CEPT pages as ASCII or PBM (even if in black & white mode with
- the all the original color information)
- o background mode (i.e. no X11 display is opened) for automated retrieval
- o Perl interface
- o modem configuration file
- o access over modem or ISDN
- o UUCP style locking
- o Software downloading
-
-
- STRUCTURE OF XCEPT
-
- XCept utilizes the well-known client-server paradigm: The server deals with the
- link layer protocol and takes care of
-
- o talking to the modem
- o setting up and maintaining the connection to the videotext provider
- (e.g. the BTX-Zentrale of the German Telekom)
- o dealing with the link layer protocol (OSI-2)
- o closing down the connection once the videotext session is terminated
-
- The client(s) talk(s) to the server via a TCP connection and take care of the
- presentation layer protocol (OSI-6). At the same time the clients entertain the
- user interface. Due to the single threaded nature of a CEPT videotext session
- only one client can at any given time deal with one server (currently one
- btxserver can only support one modem).
-
-
- RESTRICTIONS
-
- There are none, except those noted in the copyrights.
-
- N.B. for German users: The German Bundesamt fⁿr Zulassungen in der
- Telekommunikation tells us that no BZT approval for software CEPT decoders is
- necessary anymore.
-
- You are free to use the software for any purpose you want PROVIDED
- YOU KEEP ALL THE COPYRIGHT NOTICES AND THE DISCLAIMERS INTACT AND OBEY WHAT
- THEY TELL YOU AND ALLOW YOU TO DO.
-
-
- HOW TO INSTALL
-
- As of version 2.1 we have merged in a couple of patches supplied to us by
- various people for various Unix version and Unix look-a-likes (e.g. Linux).
- The only makefile you should have a look at is ceptd/makefile. Depending on
- what kind of Unix variant you're planning to use XCept you need to define
- appropriate defines here. An example for Lunix, oops, Linux is provided.
- The xcept client should compile out of the box 8=) unless you want to set
- the default XCept-Server to something different then localhost. But it
- might be a good idea to look over xcept's makefile and make sure everything
- is, where it's supposed to be.
-
-
- Installing ceptd
-
- Look at ceptd/makefile.shipped and copy it to ceptd/makefile. Then
- change the following definitions
-
- OWNER= cept
- GROUP= cept or uucp
- EXECMODE= 755
-
- BINDIR= /local/cept/bin# directory for the executable ceptd-server
- MANDIR= /local/cept/man/man8# directory for the ceptd-servers manpage
- ETCDIR= /local/cept/etc# directory for 'init file' and 'users file'
-
- # defaults for the ceptd-server :
-
- DEFAULTINITFILENAME= $(ETCDIR)/init.cept# modems default init file
- DEFAULTUSERSFILENAME= $(ETCDIR)/users.cept# file with allowed users
- DEFAULTLOGFILENAME= /local/btx/log/log.cept# logfile for user online times
- DEFAULTMODEM= /dev/com0# char. special file for modem
- DEFAULTSPEED= 2400# modem baud rate
- DEFAULTSOCKETPORT= 20005# socket port for connections
-
- Next look at xcept/makefile and change
-
- #define ceptd's hostname (Only used when not overridden by
- # environment variable XCEPTHOST or by command line optin '-h').
- SERVERHOST = localhost
-
- SERVERHOST should probably left as `localhost' if you're running both client
- and server on one machine only, and else to the name of the server machine.
- This can however be overridden at run time by either XCEPTHOST or by the
- command line option -h servername.
-
- #define directory pathname where the scripts are located which
- # should be displayed in the scripts menu. (Only used when not
- # overridden by enironment variable XCEPTSCRIPTS or by command line
- # option '-S').
- SCRIPTSDIR = /local/cept/lib
-
- Our setup is
-
- /local/cept/
- bin - here live ceptd and/or xcept
- etc - here live init.cept and users.cept (only needed
- for the server)
- lib - here live the script files and xcept.pl
- man - here live the man pages for ceptd and xcept.
-
-
- #define compiler and X11 include+library pathes
- CC = cc
- XINC = -I/usr/include/X11
- XLIB = -L/usr/X11/lib
- #WARN = -Wunused -Wswitch -Wcomment -Wshadow -Wpointer-arith -Wcast-qual
-
-
- #define location of the xcept binary and online manual (for 'make install').
- OWNER = cept
- GROUP = cept
- MODE = 755
- BINDIR = /local/cept/bin
- MANDIR = /local/cept/man/man1
-
- Next go into ceptd and do
-
- % make
- % make install
-
- and the same in the xcept directory.
-
- Finally create the lib directory (in our example /local/cept/lib), change the
- DEST definition in lib/makefile, go into lib and do a
-
- % make install
-
- TAKE CARE TO FOLLOW THE INSTRUCTIONS THAT THE VARIOUS MAKEFILES MIGHT ADVISE
- YOU TO PERFORM.
-
-
- ADVICE
-
- o Some modems need to be told to NOT use the internal buffer (AT&M2)!
- o Some modems need to be told to NOT try and connect with compression,
- use AT&K0
- o If using Ceptd and XCept on the same machine, make sure the name
- you're using for the XCept-Server (e.g. 'localhost') is known to
- your machine (i.e. entered into /etc/hosts or DNS)
-
- ENVIRONMENT VARS
-
- Xcept pays attention to
-
- XCEPTHOST which server to use
- XCEPTSCRIPTS path(s) where scripts might live --- xbtx will look at all
- the files it finds along the path and if they contain the
- token `#XCEPT' as the first characters include them in its
- list of known scripts (which it knows how to locate and
- which will be included in the `Scripts' menu)
-
- WHAT ELSE?
-
- Have fun, take a look at the scripts in lib, enjoy your life, send in bug fixes
- and improvements, spread the source, ...
-
- Oh, and you might want to try out the playbacks, too.
-
-
- WHERE TO SEND BUGFIXES AND IMPROVEMENTS
-
- I'll be happy to accept improvements and bug fixes. --- and `yes' if you really
- don't get along you might try and send me a mail, too (although I certainly don't
- guarantee same day response 8=):
-
- husemann@informatik.uni-erlangen.de
-
- Going were no man has gone before ...
-
- Dirk Husemann
-
- Dirk Husemann
- University of Erlangen-Nuremberg
- Department of Computer Science IV
- Martenstrasse 1
- D-W 8520 Erlangen, Germany
-
- Dirk.Husemann@informatik.uni-erlangen.de
- /C=de/A=dbp/P=uni-erlangen/OU=informatik/S=husemann/G=dirk/
-
-
-