/
parse_subnet.go
59 lines (53 loc) · 1.46 KB
/
parse_subnet.go
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/*
* lmap (LinuxHub's Nmap) is the nmap next generation pro plus max.
* Copyright (C) <2021> <LinuxHub-Group>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package lmap
import "net"
func GetAllIPsFromCIDR(cidr string) ([]HostInfo, error) {
ip, ipNet, err := net.ParseCIDR(cidr)
if err != nil {
return nil, err
}
var ips []HostInfo
for ip := ip.Mask(ipNet.Mask); ipNet.Contains(ip); inc(ip) {
ips = append(ips, HostInfo{
host: dupIP(ip),
isUsed: false,
})
}
if len(ips) <= 2 {
return ips, nil
}
return ips[0 : len(ips)-1], nil
}
func inc(ip net.IP) {
for j := len(ip) - 1; j >= 0; j-- {
ip[j]++
if ip[j] > 0 {
break
}
}
}
func dupIP(ip net.IP) net.IP {
// To save space, try and only use 4 bytes
if x := ip.To4(); x != nil {
ip = x
}
dup := make(net.IP, len(ip))
copy(dup, ip)
return dup
}