Generic TCP

Description

A system with a single relay server which supports multiple servers and, in turn, multiple clients for each server.

What We Need

We're on a Mac, right? Of course we are.

• The latest version of Go
• This repo

What it Does

With this TCP we can:

1. Run our relay with a selected listen port
2. Run multiple servers concurrently (I've provided an echo & a ping for your enjoyment)
3. Run multiple clients concurrently per server (we use telnet)

Example Scenario

You wrote a program that, tragically, sits behind a firewall. You desperately want to expose your server! Fortunately we can bypass the firewall with a relay.

STEP 1: We open a terminal and run the relay server, initiating a connection

• Run go run relay.go
• The default port is 7 if none is specified. However, we're free to use flag -p to designate a port for compatibility with concurrent relays

STEP 2: Now we connect our server.

We open another terminal and

• Run go run echo.go (our server we want to connect, in this case)
• Running this returns the established relay address
• Tell your clients to connect to this established relay address

STEP 3: We open our last terminal and

• Run telnet localhost 8081 (where 8081 is the established relay address)

Now you and your client are both being hosted by the relay via TCP channel. It's party time!

We can type our little hearts out:

• ex. Hello, world echoes back Hello, world

What would make it better

• Stress testing, security audit, read binary, etc.