ccnc

Netcat - which is usually abbreviated to nc is a command line networking utility for reading and writing to network connections with TCP or UDP.

This is a clone of netcat following this coding challenge - https://codingchallenges.substack.com/p/coding-challenge-59-netcat

Usage

Examples

Build the binary

go build .

Start a TCP listener on port 8888

./ccnc -l -p 8888

Start a UDP listener on port 8888

./ccnc -l -u -p 8888

Try connecting to a single port

./ccnc -z localhost 8080

Try connecting to a range of ports

./ccnc -z localhost 8000-9000

Flags

-l - Start listener (default false)
-u - Use UDP (default false - uses TCP)
--port, -p - Port to start listener on (default 8080)
-z - Try establishing connecting with a port or range of ports (boolean flag) (Check Examples for usage)