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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"unsafe"
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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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// 判断一个数组是否包含另一个数组的所有元素
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func ArrayContains(list []string, arr []string) bool {
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c := 0
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if arr == nil || list == nil {
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return false
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}
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for _, s := range arr {
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for _, t := range list {
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if s == t {
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c++
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break
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}
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}
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}
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return c == len(arr)
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}
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func ByteSlice2float32Slice(src []byte) []float32 {
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if len(src) == 0 {
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return nil
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}
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l := len(src) / 4
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ptr := unsafe.Pointer(&src[0])
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return (*[1 << 26]float32)((*[1 << 26]float32)(ptr))[:l:l]
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}
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