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