net.go

package mygo

import (
	"errors"
	"net"
)

// LocalIP 返回第一个本地 IP 地址
func (*GoNet) LocalIP() (string, error) {
	addrs, err := net.InterfaceAddrs()

	if err != nil {
		return "", err
	}

	for _, address := range addrs {
		if ipNet, ok := address.(*net.IPNet); ok && !ipNet.IP.IsLoopback() {
			if ipNet.IP.To4() != nil {
				return ipNet.IP.String(), nil
			}
		}
	}

	return "", errors.New("can't get local IP")
}

// LocalMac 获取本地MAC地址
func (*GoNet) LocalMac() (string, error) {
	interfaces, err := net.Interfaces()
	if err != nil {
		return "", err
	}

	for _, inter := range interfaces {
		address, err := inter.Addrs()
		if err != nil {
			return "", err
		}

		for _, addr := range address {
			// 检测是否是回环地址127.0.0.1 (::1)
			if ipNet, ok := addr.(*net.IPNet); ok && !ipNet.IP.IsLoopback() {
				if ipNet.IP.To4() != nil {
					return inter.HardwareAddr.String(), nil
				}
			}
		}
	}

	return "", errors.New("can't get local mac")
}