alibaba/kt-connect

package tun

import (
    "net"
    "strconv"
    "strings"
)

func toIpAndMask(cidr string) (string, string, error) {
    _, ipNet, err := net.ParseCIDR(cidr)
    if err != nil {
        return "", "", err
    }
    val := make([]byte, len(ipNet.Mask))
    copy(val, ipNet.Mask)

    var s []string
    for _, i := range val[:] {
        s = append(s, strconv.Itoa(int(i)))
    }
    return ipNet.IP.String(), strings.Join(s, "."), nil
}