Chat Service

Network's Course Project for @University of Pisa

The project's aim is to create a working network chat service in which users can send/receive messages and share files using chat. Users can ask for a new chat to the server which manage all the online users, linking them for the first time; once linked, devices can chat and share file with other users, even in groupchats. Check the project requirements for details.

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DEVICE

• signup <srv_port> <username> <password>: Allow to register a new account in the server service listening at srv_port; return error and exit if username is already used by another user.

• in <srv_port> <username> <password>: Login username if username and password are correct.

Note: The following can be used only if user is connected

• list: show all users to send messages

• hanging: List all users who send message while user were offline

• show <username>: Show messages sent by username

• chat <username>: Start a new chat chat with username if exists

  • <msg> + ENTER: send message
  • \u: show other users
  • \a <user>: add user in chat if online and not busy
  • \s <filename>: share <filename> if exists (not allowed in groupchats)
  • \c: clear chat history
  • \q: quit chat

• out: Logout and disconnect.

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SERVER

1. help: prompt an help command.

2. list: list all the connected user with their login time.

3. esc: shutdown server Note: this does not make users offline; from now on they can just use already existing chat, and not creating new ones.

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USAGE

You can use the makefile, or use ./exec.sh to compile and execute server and three devices on default port.

Devices can be executed with the following syntax:

$ ./dev <dev_port>

Server can be executed with the following syntax: [using port 4242]

$ ./server

or the following to execute on custom port:

$ ./server <server_port>

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Filippo Del Ministro, 24.06.22