65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package database
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import (
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"encoding/binary"
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"fmt"
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"net"
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)
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func IP2Int(ip net.IP) uint32 {
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if len(ip) == 16 {
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return binary.BigEndian.Uint32(ip[12:16])
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}
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return binary.BigEndian.Uint32(ip)
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}
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func Int2ip(nn uint32) net.IP {
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ip := make(net.IP, 4)
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binary.BigEndian.PutUint32(ip, nn)
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return ip
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}
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func IsIpv4(host string) bool {
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return net.ParseIP(host) != nil
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}
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//Stolen from : https://github.com/llimllib/ipaddress/
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// Return the final address of a net range. Convert to IPv4 if possible,
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// otherwise return an ipv6
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func LastAddress(n *net.IPNet) net.IP {
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ip := n.IP.To4()
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if ip == nil {
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ip = n.IP
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return net.IP{
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ip[0] | ^n.Mask[0], ip[1] | ^n.Mask[1], ip[2] | ^n.Mask[2],
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ip[3] | ^n.Mask[3], ip[4] | ^n.Mask[4], ip[5] | ^n.Mask[5],
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ip[6] | ^n.Mask[6], ip[7] | ^n.Mask[7], ip[8] | ^n.Mask[8],
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ip[9] | ^n.Mask[9], ip[10] | ^n.Mask[10], ip[11] | ^n.Mask[11],
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ip[12] | ^n.Mask[12], ip[13] | ^n.Mask[13], ip[14] | ^n.Mask[14],
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ip[15] | ^n.Mask[15]}
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}
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return net.IPv4(
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ip[0]|^n.Mask[0],
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ip[1]|^n.Mask[1],
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ip[2]|^n.Mask[2],
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ip[3]|^n.Mask[3])
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}
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func GetIpsFromIpRange(host string) (int64, int64, error) {
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var ipStart int64
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var ipEnd int64
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var err error
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var parsedRange *net.IPNet
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if _, parsedRange, err = net.ParseCIDR(host); err != nil {
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return ipStart, ipEnd, fmt.Errorf("'%s' is not a valid CIDR", host)
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}
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if parsedRange == nil {
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return ipStart, ipEnd, fmt.Errorf("unable to parse network : %s", err)
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}
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ipStart = int64(IP2Int(parsedRange.IP))
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ipEnd = int64(IP2Int(LastAddress(parsedRange)))
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return ipStart, ipEnd, nil
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}
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