+func ParsePrefix(ip string) (prefix Prefix, err error) {
+ hasPrefix := strings.Contains(ip, "/")
+ if hasPrefix {
+ netIP, network, err := net.ParseCIDR(ip)
+ if err != nil {
+ return Prefix{}, fmt.Errorf("invalid IP %s: %v", ip, err)
+ }
+ maskSize, _ := network.Mask.Size()
+ prefix.Len = byte(maskSize)
+ prefix.Address, err = ParseAddress(netIP.String())
+ if err != nil {
+ return Prefix{}, fmt.Errorf("invalid IP %s: %v", ip, err)
+ }
+ } else {
+ netIP := net.ParseIP(ip)
+ defaultMaskSize, _ := net.CIDRMask(32, 32).Size()
+ if netIP.To4() == nil {
+ defaultMaskSize, _ = net.CIDRMask(128, 128).Size()
+ }
+ prefix.Len = byte(defaultMaskSize)
+ prefix.Address, err = ParseAddress(netIP.String())
+ if err != nil {
+ return Prefix{}, fmt.Errorf("invalid IP %s: %v", ip, err)
+ }
+ }
+ return prefix, nil
+}
+
+func (p *Prefix) ToString() string {
+ ip := p.Address.ToString()
+ return ip + "/" + strconv.Itoa(int(p.Len))
+}
+