Simple network tool to list interfaces

iface.go

package main

import (
	"fmt"
	"github.com/fatih/color"
	"net"
	"os"
)

func main() {
	hwaddr := color.New(color.FgRed, color.BgBlack).SprintFunc()
	netproto := color.New(color.FgWhite, color.BgBlack).SprintFunc()
	netaddr := color.New(color.FgGreen, color.BgBlack).SprintFunc()
	ifaces, err := net.Interfaces()
	if err != nil {
		fmt.Fprintln(os.Stderr, "failed to get interfaces:", err)
		os.Exit(1)
	}

	for _, iface := range ifaces {
		// Print out hardware address
		if iface.Flags == 0 {
			continue
		}
		fmt.Printf("%-12s %-24s %s\n", iface.Name, iface.Flags, hwaddr(iface.HardwareAddr))
		// Print out network address
		addrs, err := iface.Addrs()
		if err != nil {
			continue
		}
		for _, addr := range addrs {
			fmt.Printf("%12s %6s %s\n", "", netproto(addr.Network()), netaddr(addr.String()))
		}
	}
}