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CSC645/745 COMPUTER NETWORKSProject 11. GoalThe goal of this

CSC645/745 COMPUTER NETWORKSProject 11. GoalThe goal of this project is to write simple client and server programs for textmessaging and Internet chatting. The programming language is C and theoperating system is Linux.2. InstructionWrite a server program and a client program. The server manages a number ofclient accounts, each having a username and a password.Start the server first. When a client process is started, it has a menu for sixfunctions:0. Connect to the server1. Get the user list2. Send a message3. Get my messages4. Initiate a chat with my friend5. Chat with my friendThese functions allow the client to log onto the server through a TCP connectionusing his/her username and password, get the list of other users on the server,send a text message to another user, check his/her own text messages that wereleft by other users, and perform chat with another user.3. Sample CodeWe provide sample code consisting of an “echo” server program and a clientprogram. The client establishes a TCP connection with the server, and sends amessage to the server, which will echo the message back to the client for display.Essentially, it gives you a programming template that you can follow to writeyour own networking program.4. DemoUse the following scenario for demo. The server maintains two client accounts.One is for Alice, and the other is for Bob. Alice logs onto the server first. She getsthe user list and sees Bob. She sends a text message to Bob. The message carriesAlice’s IP address x and a port number y. After that, Alice selects “4. Initiate achat with my friend”, which terminates the TCP connection to the server, andwaits on port y for chatting with Bob. Next, Bob logs onto the server. He logs onand retrieves his text messages. After seeing Alice’s message, Bob selects “5. Chatwith my friend”, which terminates the TCP connection to the server, and starts anew TCP connection to Alice on port y. Then, Alice and Bob type in turn, and thetext typed by one will be sent to the other for display.More details can be found from the demo video posted on iLearn.5. SubmissionSubmit one ZIP file consisting of all source files and executables to the regularsubmission link on iLearn.

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