/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package net

import (
	"net"
)

// IPAddrs finds and returns a list of non-loopback IPv4 addresses of the
// current machine.
func IPAddrs() (ips []net.IP, err error) {
	ips = []net.IP{}

	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return
	}

	for _, a := range addrs {
		if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				ips = append(ips, ipnet.IP)

			}
		}
	}

	return ips, nil
}

// FormatAddress checks that the address has a consistent format.
func FormatAddress(addr string) string {
	if ip := net.ParseIP(addr); ip != nil {
		// If this is an IPv6 address, encapsulate it in brackets
		if ip.To4() == nil {
			return "[" + ip.String() + "]"
		}
		return ip.String()
	}
	return addr
}