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