You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
2 years ago
|
package httpreverse
|
||
|
|
|
||
|
|
import (
|
||
|
|
"strconv"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
func IPCIDR(ip string) (string, int, error) {
|
||
|
|
if !strings.Contains(ip, "/") {
|
||
|
|
return ip, 32, nil
|
||
|
|
}
|
||
|
|
tmp := strings.Split(ip, "/")
|
||
|
|
cidr, err := strconv.Atoi(tmp[1])
|
||
|
|
if err != nil {
|
||
|
|
return "", 0, err
|
||
|
|
}
|
||
|
|
intIp, err := IP2Int(tmp[0])
|
||
|
|
if err != nil {
|
||
|
|
return "", 0, err
|
||
|
|
}
|
||
|
|
ip, err = Int2IP(int((uint32(intIp) >> (32 - cidr)) << (32 - cidr)))
|
||
|
|
return ip, cidr, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func IPEnd(ip string, cidr int) (string, error) {
|
||
|
|
intIp, err := IP2Int(ip)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
ip, err = Int2IP(int(uint32(intIp) | ((uint32(4294967295) << cidr) >> cidr)))
|
||
|
|
return ip, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func IPStart(ip string, cidr int) (string, error) {
|
||
|
|
intIp, err := IP2Int(ip)
|
||
|
|
if err != nil {
|
||
|
|
return "", err
|
||
|
|
}
|
||
|
|
ip, err = Int2IP(int((uint32(intIp) >> (32 - cidr)) << (32 - cidr)))
|
||
|
|
return ip, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func IPInRange(cidrip, ip string) (bool, error) {
|
||
|
|
w, c, err := IPCIDR(cidrip)
|
||
|
|
if err != nil {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
f, _, err := IPCIDR(ip + "/" + strconv.Itoa(c))
|
||
|
|
if err != nil {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
return w == f, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func IPinRange2(startIP string, cidr int, ip string) (bool, error) {
|
||
|
|
f, _, err := IPCIDR(ip + "/" + strconv.Itoa(cidr))
|
||
|
|
if err != nil {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
return startIP == f, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func IP2Int(ipAddr string) (int, error) {
|
||
|
|
var ipNum uint32 = 0
|
||
|
|
ipFilter := strings.Split(ipAddr, ".")
|
||
|
|
for i := 0; i < len(ipFilter); i++ {
|
||
|
|
num, err := strconv.ParseUint(ipFilter[len(ipFilter)-1-i], 10, 32)
|
||
|
|
ipNum |= (uint32(num) << (8 * uint32(i)))
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return int(ipNum), nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func Int2IP(intIP int) (string, error) {
|
||
|
|
var result string
|
||
|
|
var ip uint32
|
||
|
|
ip = uint32(intIP)
|
||
|
|
for i := 0; i < 4; i++ {
|
||
|
|
result += strconv.FormatUint(uint64(uint8(ip>>uint8((3-i)*8))), 10) + "."
|
||
|
|
}
|
||
|
|
return result[0 : len(result)-1], nil
|
||
|
|
}
|