tcp-listener

TCP Listener

This is a simple TCP listener for data and whatnot.

It only listens and doesn't respond to anything. All it does is recieve data and blurt it out on the screen.

I made it for monitoring and debugging a project that involves networking.

Installation

Assuming you have Node.js and NPM installed,

[sudo] npm install -g tcp-listener

Usage

  Usage: tcp-listener [options]

  A simple TCP listener that blurts out whatever it reads.

  Options:

    -V, --version         output the version number
    -p, --port <port>     Port to listen on
    -d, --display <mode>  Display mode (text, hex, both)
    -e, --encoding <fmt>  Encoding ("utf8" is default)
    -h, --help            output usage information

The --encoding option takes Node.js encoding identifiers.

Example

If you start the server on port 80 and try connect to it using Firefox, this is what you get (well, it's more colorful IRL).

$ tcp-listener -d text -p 80

Info: Server started on port 80.
Info: Client [::ffff:192.168.1.82]:49643 connected.
[::ffff:192.168.1.82]:49643 ~ 349 bytes.
GET / HTTP/1.1
Host: 192.168.1.25
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:61.0) Gecko/20100101 Firefox/61.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-GB,en-US;q=0.7,en-NZ;q=0.3
Accept-Encoding: gzip, deflate
DNT: 1
Connection: keep-alive
Upgrade-Insecure-Requests: 1


Client disconnected.