This is a conference room project based on socket programming, for more details you can refer to project2.pdf.
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What is in this directory?
README this file chatclient.c contains source code of chat client chatserver.c contains source code of chat server chatlinker.c routines used by server and client common.h header file included by all .c files makefile make file to build chatserver and chatclient
goodchatserver chat server executable goodchatclient chat client executable groups example groups file
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What do we have to do?
You have to supply the missing code in the files 'chatclient.c', 'chatserver.c' and 'chatlinker.c'. The location of missing code is marked with "FILL HERE". Your task is to fill in the missing code.
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How do i compile my programs?
The 'makefile' is provided just for that purpose. To compile, run
% make
It will create 'chatserver' and 'chatclient'.
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How do i test my programs?
You are supplied with executables 'goodchatserver' and 'goodchatclient'. These are the binaries of our implementation. You can run them and see how they behave. Your implementation is expected to produce similar effect.
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How do i run these programs?
The 'goodchatserver' program takes a command line argument . For example you can run it as follows.
% goodchatserver groups
The 'goodchatclient' program doesn't take any arguments and you simply run it as
% goodchatclient
You run the server first and then many clients. The clients connect to the server and prompt you to enter a group name. Here is an example
admin: connected to server on 'zeus.ite.gmu.edu' at '35739' group capacity occupancy singles 5 0 vikings 7 0 politics 2 0 cricket 9 0 which group?
If you enter group name, it will prompt you for your nickname. Once you enter that it will look as follows
admin: connected to server on 'zeus.ite.gmu.edu' at '35739' group capacity occupancy singles 5 0 vikings 7 0 politics 2 0 cricket 9 0 which group? singles what nickname? gary admin: joined 'singles' as 'gary'
If other clients are also run and become members, whatever is typed by a client would appear at all clients of that particular group.
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How do i exit from these programs?
In case of client, if you type "/end" or press 'Return' when it prompts you for group name or nickname, it will exit.
If the client already joined a group, typing "/end' on a line by itself will make the client leave the group. It will once again list the groups and prompt you for group name.
At this point you can enter some other group or exit by typing "/end" or pressing 'Return' as explained before.
In case of server, you can just press Ctrl-C to kill it.
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Do these programs run on any machine?
They are compiled on zeus.ite.gmu.edu. They may work on other machines with different versions. First try running and see.
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I am getting the following errors. What do i do?
When you run 'chatserver' if it says
error : server already exists
that means either a 'chatserver' is already running or somehow the previous 'chatserver' didn't exit cleanly. In the second case, you can do the cleanup manually by removing the '.chatport'. You can check and delete the link by doing as follows.
% cd % ls -l .chatport .chatport -> zeus.ite.gmu.edu:35743 % rm .chatport
When you run 'chatclient' if it says
error : no active chat server
it just means that 'chatserver' is not running. Run the 'chatserver' before you run the clients.