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ip.go
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ip.go
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package znet
import (
"encoding/hex"
"errors"
"fmt"
"net"
"strconv"
"strings"
)
// LocallIP 获取本地IP地址
func LocallIP() (string, error) {
ifaces, err := net.Interfaces()
if err != nil {
return "", err
}
for _, iface := range ifaces {
if iface.Flags&net.FlagUp == 0 {
continue // interface down
}
if iface.Flags&net.FlagLoopback != 0 {
continue // loopback interface
}
addrs, err := iface.Addrs()
if err != nil {
return "", err
}
for _, addr := range addrs {
var ip net.IP
switch v := addr.(type) {
case *net.IPNet:
ip = v.IP
case *net.IPAddr:
ip = v.IP
}
if ip == nil || ip.IsLoopback() {
continue
}
ip = ip.To4()
if ip == nil {
continue // not an ipv4 address
}
return ip.String(), nil
}
}
return "", errors.New("are you connected to the network?")
}
// ConvertToHex 将IP地址转换为十六进制数据
// 例如将 127.0.0.1 转换为 7F 00 00 01
func ConvertToHex(ip string) (ipHex []byte, err error) {
_ips := strings.Split(ip, ".")
if len(_ips) != 4 {
err = errors.New("Invalid IP")
return
}
var _is string
for _, i := range _ips {
_i, err := strconv.Atoi(i)
if err != nil {
return ipHex, err
}
_is += fmt.Sprintf("%02X", _i)
}
return hex.DecodeString(_is)
}