mirror of https://github.com/h44z/wg-portal.git
38 lines
787 B
Go
38 lines
787 B
Go
package common
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import "net"
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// BroadcastAddr returns the last address in the given network, or the broadcast address.
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func BroadcastAddr(n *net.IPNet) net.IP {
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// The golang net package doesn't make it easy to calculate the broadcast address. :(
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var broadcast net.IP
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if len(n.IP) == 4 {
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broadcast = net.ParseIP("0.0.0.0").To4()
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} else {
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broadcast = net.ParseIP("::")
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}
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for i := 0; i < len(n.IP); i++ {
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broadcast[i] = n.IP[i] | ^n.Mask[i]
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}
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return broadcast
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}
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// http://play.golang.org/p/m8TNTtygK0
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func IncreaseIP(ip net.IP) {
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for j := len(ip) - 1; j >= 0; j-- {
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ip[j]++
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if ip[j] > 0 {
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break
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}
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}
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}
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// IsIPv6 check if given ip is IPv6
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func IsIPv6(address string) bool {
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ip := net.ParseIP(address)
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if ip == nil {
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return false
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}
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return ip.To4() == nil
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}
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