TCP echo client/server in Go

Purpose

As I'm learning Go, I found an Echo client/server is the next logical step after messing around with basic TCP/IP client and server programming.

Usage

Running client

go run client/client.go

More options

go run client/client.go --help

Running server

go run server/server.go

More options

go run server/server.go --help

Troubleshooting

A typical TCP Echo server listens for connections on TCP port 7. In this very example, I'm using 7000 so you don't have to run it as root. However, if you want to troubleshoot it against a real server, remember to change the bind/connect port using --port flag.

Enable TCP Echo Protocol on inetd

Add the following lines to /etc/inetd.conf file:

echo   stream  tcp     nowait  root    internal

Run client against inetd's Echo

go run client/client.go --port 7

Test server using netcat

nc -v localhost 7000