package util
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import (
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"bytes"
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"errors"
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"net"
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"strconv"
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)
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// 获取本机网卡IP
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func GetLocalIP(networkName string) (ipv4 string,mask string, err error) {
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interfaces, err := net.Interfaces()
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if err != nil {
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return "","", err
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}
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for _, i := range interfaces {
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byName, err := net.InterfaceByName(i.Name)
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if err != nil {
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return "","", err
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}
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addresses, err := byName.Addrs()
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for _, v := range addresses {
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if ipnet, ok:=v.(*net.IPNet);ok && !ipnet.IP.IsLoopback(){
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if ipnet.IP.To4() !=nil{
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if byName.Name == networkName{
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maskStr := ipnet.Mask.String()
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mask64, _ := strconv.ParseUint(maskStr, 16, 32)
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return ipnet.IP.String(),IpIntToString(int(mask64)),nil
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}
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}
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}
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}
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}
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return "","", errors.New("ipv4 not found")
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}
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func IpIntToString(ipInt int) string{
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ipSegs := make([]string, 4)
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var len int = len(ipSegs)
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buffer := bytes.NewBufferString("")
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for i := 0; i < len; i++ {
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tempInt := ipInt & 0xFF
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ipSegs[len-i-1] = strconv.Itoa(tempInt)
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ipInt = ipInt >> 8
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}
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for i := 0; i < len; i++ {
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buffer.WriteString(ipSegs[i])
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if i < len-1 {
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buffer.WriteString(".")
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}
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}
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return buffer.String()
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}
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