76 lines
1.4 KiB
Go
76 lines
1.4 KiB
Go
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package cidr
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import (
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"net"
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"git.loafle.net/commons_go/util/net/converter"
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)
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type cidrRangeIPv4 struct {
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cidrNet *net.IPNet
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}
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func (cr *cidrRangeIPv4) Contains(ip net.IP) bool {
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return cr.cidrNet.Contains(ip)
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}
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func (cr *cidrRangeIPv4) First() net.IP {
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nIP := cr.Network()
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return cr.Next(nIP)
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}
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func (cr *cidrRangeIPv4) Last() net.IP {
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bIP := cr.Broadcast()
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return cr.Previous(bIP)
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}
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func (cr *cidrRangeIPv4) Range() []net.IP {
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fIP := cr.First()
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if nil == fIP {
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return nil
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}
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lIP := cr.Last()
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if nil == lIP {
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return nil
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}
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fNum := converter.IPv4ToInt(fIP.To4())
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lNum := converter.IPv4ToInt(lIP.To4())
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r := make([]net.IP, 0)
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for i := fNum; i <= lNum; i++ {
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r = append(r, converter.IntToIPv4(i))
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}
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return r
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}
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func (cr *cidrRangeIPv4) Broadcast() net.IP {
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ip := cr.cidrNet.IP.To4()
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bIP := net.IPv4(0, 0, 0, 0).To4()
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for i := 0; i < len(bIP); i++ {
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bIP[i] = ip[i] | ^cr.cidrNet.Mask[i]
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}
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return bIP
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}
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func (cr *cidrRangeIPv4) Network() net.IP {
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ip := cr.cidrNet.IP.To4()
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return ip.Mask(cr.cidrNet.Mask)
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}
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func (cr *cidrRangeIPv4) Next(ip net.IP) net.IP {
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nNum := converter.IPv4ToInt(ip.To4()) + 1
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nIP := converter.IntToIPv4(nNum)
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if cr.Contains(nIP) {
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return nIP
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}
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return nil
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}
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func (cr *cidrRangeIPv4) Previous(ip net.IP) net.IP {
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nNum := converter.IPv4ToInt(ip.To4()) - 1
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nIP := converter.IntToIPv4(nNum)
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if cr.Contains(nIP) {
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return nIP
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}
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return nil
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}
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