Get Network Interfaces

getInterfaces.go

package main

import (
	"net"
	"fmt"
	"regexp"
	"strings"
)

var tempInterfacesConfig string
var targetInterface string

func validIP4(ipAddress string) bool {
	 ipAddress = strings.Trim(ipAddress, " ")

	 re, _ := regexp.Compile(`^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$`)
	 if re.MatchString(ipAddress) {
		 return true
	 }
	 return false
}

func LoadInterfaces() []string {
	var ifaceList []string
	ifaces, err := net.Interfaces()
	if err != nil {
		fmt.Print("localAddresses: %+v\n", err.Error())
		return ifaceList
	}
	for _, i := range ifaces {
		iface := i.Name
		addrs, err := i.Addrs()
		if err != nil {
			fmt.Print("localAddresses: %+v\n", err.Error())
			continue
		}
		for _, a := range addrs {
			switch v := a.(type) {
			case *net.IPAddr:
				iface = fmt.Sprintf("%v : %s (%s)", i.Name, v.IP, v.IP.DefaultMask())

			case *net.IPNet:
				if !v.IP.IsLoopback() {
					if v.IP.To4() != nil {
						iface = fmt.Sprintf("%v : %s [%v/%v]", i.Name, v, v.IP.String(), v.Mask)
					}
				}
			default:
				iface = iface + "None"
			}
		}
		ifaceList = append(ifaceList, iface)

	}
	return ifaceList
}


func main() {
	list := LoadInterfaces()
	for _,v := range list {
		fmt.Println(v)
	}
}