/Xnet-catX

NetCat, the nc system command, is a command line utility that reads and writes data over network connections using TCP or UDP. It is used for anything related to TCP, UDP or UNIX-domain sockets, it can open TCP connections, send UDP packets, listen on arbitrary TCP and UDP ports

Primary LanguageGo

net-cat

How to run:

  1. Run the go build TCPChat.go command in the root directory of the project
  2. Run the ./TCPChat $port

Description

This project consists on recreating the NetCat in a Server-Client Architecture that can run in a server mode on a specified port listening for incoming connections, and it can be used in client mode, trying to connect to a specified port and transmitting information to the server.

  • NetCat, nc system command, is a command-line utility that reads and writes data across network connections using TCP or UDP. It is used for anything involving TCP, UDP, or UNIX-domain sockets, it is able to open TCP connections, send UDP packages, listen on arbitrary TCP and UDP ports and many more.

Net-cat creates a group chatvia TCP. The project has the following features :

  • TCP connection between server and multiple clients (relation of 1 to many).
  • A name requirement to the client.
  • Control connections quantity.
  • Clients must be able to send messages to the chat.
  • Do not broadcast EMPTY messages from a client.
  • Messages sent, must be identified by the time that was sent and the user name of who sent the message, example : [2020-01-20 15:48:41][client.name]:[client.message]
  • If a Client joins the chat, all the previous messages sent to the chat must be uploaded to the new Client.
  • If a Client connects to the server, the rest of the * Clients must be informed by the server that the Client joined the group.
  • If a Client exits the chat, the rest of the Clients must be informed by the server that the Client left.
  • All Clients must receive the messages sent by other Clients.
  • If a Client leaves the chat, the rest of the Clients must not disconnect.
  • If there is no port specified, then set as default the port 8989. Otherwise, program must respond with usage message: [USAGE]: ./TCPChat $port

Instructions

  • Start TCP server, listen and accept connections
  • The project has Go-routines
  • The project has channels and Mutexes
  • Accepts maximum 10 connections

Packages

  • Only standard library was used

Usage

Server: 
$ go run .
Listening on the port :8989
$ go run . 2525
Listening on the port :2525
$ go run . 2525 localhost
[USAGE]: ./TCPChat \$port
$

Client:
$ nc localhost 2525

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