Free client server system software for linux

DTLS Client/Server Example contains a simple DTLS client and DTLS server to show how to send UDP data over an encrypted channel using OpenSSL DTLSv1 support.

LIST OF FILES:

Directory: common - Contains callback functions and error reporting functions common to client and server

sslmgr.h
sslmgr.c

Directory: dtls_server

dtls_server.c - DTLS server part

Directory: dtls_client

dtls_client.c - DTLS client part

Online Cardgame System project is a client-server system for playing card games over the net.
OCS is a client-server cardgame system, similar to those found at Yahoo! Games and elsewhere. The server is portable and has been tested under Linux, Win32, and several unix systems. We currently have Win32 and Java clients available, and a Qt client for Linux is in development.
Games are implemented as plugin modules, so new games can be added without recompiling the server. In addition, the client is written to be unaware of the mechanics of gameplay, so it can theoretically play any games the server supports without having to know how to play them specifically.
We currently have Euchre and Spades implemented, with bot support for both games, meaning you dont need a full 4 people to play a game. We plan on implementing more games in the future.
On a side note, development of this project tends to wax and wane with our motivation and amount of schoolwork.
Enhancements:
- Massive restructure of code into more object orientated patterns
- Added daemon capability to server
- Got rid of checksumming in the protocol since TCP/IP does it internally
- Padded STRINGS in the protocol on DWORD boundaries
- Added support for loadable account managers
- Removed crypting of the password by ocsd (account managers may do it)
- Added ODBC (for windows) and mySQL (for unix) account managers (database connectivity!!)
- Modified packet classes to throw exceptions instead of returning true-false
- Created packet manager classes to queue client packets, reduces total send calls
- Implemented bots when there arent enough people to play games
- Added new command line processing capabilities as well as configuration file support
- Fixed bug that allowed a person to overwrite an account when creating that same account
- Win32 - Made server link with DLL runtime library to reduce executable size and ease DLL dependencies
- Updated messages to be sent in HTML since the main clients support it
- Created Java client which can be run as an application or as an applet
- After a client is booted from a game, they cannot join the game again until they receive an invitation
- Fixed libtidy bug which caused it to erroneously format HTML
- Euchre supports intelligent bots
- Spades supports moronic bots (the AI is horrible but allows for gameplay)
- Fixed Spades textual problem when a round was over.
- Fixed Spades score calculation that resulted in no loss of points
- Win32 client now supports HTML (IE4+ required)
- Win32 client can now join games by right-clicking on an empty game slot in the game view.
- Fixed major bug in Win32 client that would cause it to crash when sending private messages
- Win32 client can now use /msg to send private messages

XML-RPC Client/Server C Library is a cross-platform software written in C that supports persistent HTTP/1.1 conenctions over SSL and comes with XML-RPC interface description language and client/server code compiler. Libxr depends on glib2 and libxml2.
Main features:
- Persistent connections over HTTP/1.1
- SSLv3/TLSv1 using OpenSSL.
- XML-RPC interface description language (XDL).
- XML-RPC client stubs/servlet skels compiler.
- Multiple servlets per server.
- Servlet lifetime (init -- call -- call -- fini).
- Multiplatform (linux, mingw32 on windows).
- IPV6 as soon as OpenSSL 0.9.9 is released.

Digital Disco System is a client/server-based audio player for disco purposes as well as at-home usage. It has an console frontend (usable in shell scripts) and an X-fontend in the style of XMMS.

The VTQLserver package contains a server and clients for videotext access for Linux. The server stores the pages of several TV-stations for parallel reading and searching.

You can run many clients in parallel i.e. search all videotext pages, and view them. The only limit is, that the server does not scale well and is not as stable as you may expect it for running it on a server machine. It is intended to be used on workstations, since I do not think, servers have TV cards nor do I have a server machine.

Terminal Server Client (tsclient) is a frontend for rdesktop and other remote desktop tools.
Main features:
- GTK+-2 frontend for rdesktop and other remote desktop tools
- GNOME panel applet to quickly launch saved profiles
- reads and writes profiles in the Microsoft format (.rdp), maintaining compatability with the Microsoft client
- similar look and functionality to the Microsoft client
- written in C using GTK and GNOME
- features a profile launcher which launches saved profiles
- Translated to 20+ languages.
- support for rdesktop 1.3
- support for VNC clients (*vncviewer)
- supported vnc options are -fullscreen, -geometry, -depth and -viewonly (set by checking "no motion events"). for a vncpasswd file, put the full path to the file in the username field.
- support for X via Xnest

k12admin-server project is a web-based server administration tool for K-12 school systems (server package).
K12Admin is a Wide Area Network administration program geared specifically to K-12 school systems.
It allows teachers in individual schools to administer the accounts in that school. K12Admin will administer the account information on client Linux servers in each school from a central server.
All administration is done through a Web browser interface. The system also includes inappropriate Web use scanning and security auditing. The k12admin-server package is the server part of the K12Admin system.
It will typically be run on only one computer in a district. In order to be fully functional, the k12admin-client package needs to be installed on at least one server, possibly even the k12admin-server machine.
Enhancements:
- Added storyboard database - students and teachers can enter original stories, with pictures.
- Added title field to users table (ie Mr. Mrs. Miss) I use this for the StoryBoard so that a teachers first name is not displayed.
- No usable passwords for default users on new installs
- Passwords for default domain admins (demoteacher, swedishteacher, frenchteacher) are set to the password supplied on install for the mysql database.

Messa is an instant messager client and server. The client has a curses interface and works on the console.

Messa project supports multilingual messages and private messages. The server supports monoprocess operation (without threads), the ability to choose the listening port, and the ability to run under the console.