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 }