Function getValidIPv4Addr

respounder.go:217–226

From all the IP addresses of this interface, extract the IPv4 address where we'll bind to

(addrs []net.Addr)

// From all the IP addresses of this interface,
// extract the IPv4 address where we'll bind to
func getValidIPv4Addr(addrs []net.Addr) net.IP {
	var ip net.IP
	for _, addr := range addrs { // amongst all addrs,
		ip = addr.(*net.IPNet).IP.To4() // pick the IPv4 addr
		if ip != nil && ip.String() != "127.0.0.1" {
			break
		}
	}
	return ip
}

// parses cmd line flag and set appropriate variables
func initFlags() {