wg-portal/internal/common/iputil.go

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package common
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import (
"net"
"strings"
)
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// BroadcastAddr returns the last address in the given network, or the broadcast address.
func BroadcastAddr(n *net.IPNet) net.IP {
// The golang net package doesn't make it easy to calculate the broadcast address. :(
var broadcast net.IP
if len(n.IP) == 4 {
broadcast = net.ParseIP("0.0.0.0").To4()
} else {
broadcast = net.ParseIP("::")
}
for i := 0; i < len(n.IP); i++ {
broadcast[i] = n.IP[i] | ^n.Mask[i]
}
return broadcast
}
// http://play.golang.org/p/m8TNTtygK0
func IncreaseIP(ip net.IP) {
for j := len(ip) - 1; j >= 0; j-- {
ip[j]++
if ip[j] > 0 {
break
}
}
}
// IsIPv6 check if given ip is IPv6
func IsIPv6(address string) bool {
ip := net.ParseIP(address)
if ip == nil {
return false
}
return ip.To4() == nil
}
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func ParseIPList(lst string) []string {
ips := strings.Split(lst, ",")
validatedIPs := make([]string, 0, len(ips))
for i := range ips {
ips[i] = strings.TrimSpace(ips[i])
if ips[i] != "" {
validatedIPs = append(validatedIPs, ips[i])
}
}
return validatedIPs
}
func IPListToString(lst []string) string {
return strings.Join(lst, ", ")
}