CS476/576

Assignment #5

Due Midnight, Tuesday   Nov  16, 1999

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NAME

       chatd -  a multi party chat server (or daeom).
       chat  -  a multi party chat client.

SYNOPSIS

        chatd [port]
        chat uname host port
 

DESCRIPTION
 

Chatd creates a tcp port and accepts connections from any number of chat clients. The tcp port may be specified as a command line argument to chatd otherwise a free port is assigned and its number is announced by chatd.

Examples:
....
% chatd 8000 &
.......
% chatd &
Port number is 7689
.....
% chatd 7689
binding name to stream socket: Address already in use
.....

Chat connects to chatd using the information provided on the command line arguments (host and port). After chat is  connected to chatd, it sends the user name (uname) of its user to chatd. Any line typed by a user of chat is sent to chatd where it is  sent to all other participants. Every line is prefixed with the sender's  uname. Any line received by chat from chatd is displayed to the user
in a separate window.  Any user can leave the conversation at any time while
all other participants  may continue to chat.

Chatd never dies, even if the last participant leaves. You have to kill it with a fatal signal.

Examples:
......
% chat wahab dogwood 12345
.......
% chat wahab 128.82.4.67  12345
.....

NOTE: The user interface  to this program is up to each of you. The only constraint is to seperate the typed messages by a participant  from the ecieved messages typed by  other participants. (e.g., you may use two xterms, one for typing and another for displaying the recieved messages).