package utils

import (
	"fmt"
	"net"
)

// 获取本机 ip
// 获取第一个非 loopback ip
func LocalIP() (net.IP, error) {
	tables, err := net.Interfaces()
	if err != nil {
		return nil, err
	}
	for _, t := range tables {
		addrs, err := t.Addrs()
		if err != nil {
			return nil, err
		}
		for _, a := range addrs {
			ipnet, ok := a.(*net.IPNet)
			if !ok || ipnet.IP.IsLoopback() {
				continue
			}
			if v4 := ipnet.IP.To4(); v4 != nil {
				return v4, nil
			}
		}
	}
	return nil, fmt.Errorf("cannot find local IP address")
}