45 lines
962 B
Go
45 lines
962 B
Go
package cidr
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
)
|
|
|
|
func NewCIDRRanger(cidr string) (CIDRRanger, error) {
|
|
_, nIPNet, err := net.ParseCIDR(cidr)
|
|
if nil != err {
|
|
return nil, err
|
|
}
|
|
|
|
switch len(nIPNet.IP) {
|
|
case net.IPv4len:
|
|
cr := &cidrRangeIPv4{
|
|
cidrNet: nIPNet,
|
|
}
|
|
return cr, nil
|
|
case net.IPv6len:
|
|
cr := &cidrRangeIPv6{
|
|
cidrNet: nIPNet,
|
|
}
|
|
return cr, nil
|
|
default:
|
|
return nil, fmt.Errorf("Net: not supported IP length")
|
|
}
|
|
}
|
|
|
|
type CIDRRanger interface {
|
|
Contains(ip net.IP) bool
|
|
First() net.IP
|
|
Last() net.IP
|
|
Range() []net.IP
|
|
// (!Contains(startIP) || !Contains(endIP)) return error
|
|
// (startIP > endIP) return error
|
|
// (nil != startIP && nil != endIP) return (startIP ~ endIP) + include - exclude
|
|
// (nil == startIP || nil == endIP) return include - exclude
|
|
Ranges(startIP net.IP, endIP net.IP, include []net.IP, exclude []net.IP) ([]net.IP, error)
|
|
Broadcast() net.IP
|
|
Network() net.IP
|
|
Next(ip net.IP) net.IP
|
|
Previous(ip net.IP) net.IP
|
|
}
|