español - Go/GoLang comprueba la dirección IP en el rango

enter ip address en español

Question

En Go / GoLang, ¿cuál es la forma más rápida de verificar si una dirección IP está dentro de un rango específico?

Por ejemplo, dado el rango 216.14.49.184 a 216.14.49.191 , ¿cómo puedo verificar si una dirección IP de entrada dada está en ese rango?

Answer 1

¿Qué tal alguna implementación como inet_pton? El resultado es fácil de almacenar.

func IP2Integer(ip *net.IP) (int64, error) {
ip4 := ip.To4()
if ip4 == nil {
return 0, fmt.Errorf("illegal: %v", ip)
}
bin := make([]string, len(ip4))
for i, v := range ip4 {
bin[i] = fmt.Sprintf("%08b", v)
}
return strconv.ParseInt(strings.Join(bin, ""), 2, 64)
}

Answer 2

Esto ya está en stdlib en el paquete "net" como una función llamada net.Contains. ¡No necesitas reescribir el código que ya existe!

Vea la documentación here .

Para usarlo solo hay que analizar las subredes deseadas.

network := "192.168.5.0/24"
clientips := []string{
"192.168.5.1",
"192.168.6.0",
}
_, subnet, _ := net.ParseCIDR(network)
for _, clientip := range clientips {
ip := net.ParseIP(clientip)
if subnet.Contains(ip) {
fmt.Println("IP in subnet", clientip)
}
}

En caso de que el código anterior no tenga sentido aquí es un enlace de Google Play

Answer 3

La versión genérica para ipv4 / ipv6.

ip.go:

package ip
import (
"bytes"
"net"
"github.com/golang/glog"
)
//test to determine if a given ip is between two others (inclusive)
func IpBetween(from net.IP, to net.IP, test net.IP) bool {
if from == nil || to == nil || test == nil {
glog.Warning("An ip input is nil") // or return an error!?
return false
}
from16 := from.To16()
to16 := to.To16()
test16 := test.To16()
if from16 == nil || to16 == nil || test16 == nil {
glog.Warning("An ip did not convert to a 16 byte") // or return an error!?
return false
}
if bytes.Compare(test16, from16) >= 0 && bytes.Compare(test16, to16) <= 0 {
return true
}
return false
}

y ip_test.go:

package ip
import (
"net"
"testing"
)
func TestIPBetween(t *testing.T) {
HandleIpBetween(t, "0.0.0.0", "255.255.255.255", "128.128.128.128", true)
HandleIpBetween(t, "0.0.0.0", "128.128.128.128", "255.255.255.255", false)
HandleIpBetween(t, "74.50.153.0", "74.50.153.4", "74.50.153.0", true)
HandleIpBetween(t, "74.50.153.0", "74.50.153.4", "74.50.153.4", true)
HandleIpBetween(t, "74.50.153.0", "74.50.153.4", "74.50.153.5", false)
HandleIpBetween(t, "2001:0db8:85a3:0000:0000:8a2e:0370:7334", "74.50.153.4", "74.50.153.2", false)
HandleIpBetween(t, "2001:0db8:85a3:0000:0000:8a2e:0370:7334", "2001:0db8:85a3:0000:0000:8a2e:0370:8334", "2001:0db8:85a3:0000:0000:8a2e:0370:7334", true)
HandleIpBetween(t, "2001:0db8:85a3:0000:0000:8a2e:0370:7334", "2001:0db8:85a3:0000:0000:8a2e:0370:8334", "2001:0db8:85a3:0000:0000:8a2e:0370:7350", true)
HandleIpBetween(t, "2001:0db8:85a3:0000:0000:8a2e:0370:7334", "2001:0db8:85a3:0000:0000:8a2e:0370:8334", "2001:0db8:85a3:0000:0000:8a2e:0370:8334", true)
HandleIpBetween(t, "2001:0db8:85a3:0000:0000:8a2e:0370:7334", "2001:0db8:85a3:0000:0000:8a2e:0370:8334", "2001:0db8:85a3:0000:0000:8a2e:0370:8335", false)
HandleIpBetween(t, "::ffff:192.0.2.128", "::ffff:192.0.2.250", "::ffff:192.0.2.127", false)
HandleIpBetween(t, "::ffff:192.0.2.128", "::ffff:192.0.2.250", "::ffff:192.0.2.128", true)
HandleIpBetween(t, "::ffff:192.0.2.128", "::ffff:192.0.2.250", "::ffff:192.0.2.129", true)
HandleIpBetween(t, "::ffff:192.0.2.128", "::ffff:192.0.2.250", "::ffff:192.0.2.250", true)
HandleIpBetween(t, "::ffff:192.0.2.128", "::ffff:192.0.2.250", "::ffff:192.0.2.251", false)
HandleIpBetween(t, "::ffff:192.0.2.128", "::ffff:192.0.2.250", "192.0.2.130", true)
HandleIpBetween(t, "192.0.2.128", "192.0.2.250", "::ffff:192.0.2.130", true)
HandleIpBetween(t, "idonotparse", "192.0.2.250", "::ffff:192.0.2.130", false)
}
func HandleIpBetween(t *testing.T, from string, to string, test string, assert bool) {
res := IpBetween(net.ParseIP(from), net.ParseIP(to), net.ParseIP(test))
if res != assert {
t.Errorf("Assertion (have: %s should be: %s) failed on range %s-%s with test %s", res, assert, from, to, test)
}
}

Answer 4

Las direcciones IP se representan como segmentos de []byte bigendianos []byte en go (el tipo de IP ), por lo que se compararán correctamente usando bytes.Compare .

Por ejemplo

package main
import (
"bytes"
"fmt"
"net"
)
var (
ip1 = net.ParseIP("216.14.49.184")
ip2 = net.ParseIP("216.14.49.191")
)
func check(ip string) bool {
trial := net.ParseIP(ip)
if trial.To4() == nil {
fmt.Printf("%v is not an IPv4 address/n", trial)
return false
}
if bytes.Compare(trial, ip1) >= 0 && bytes.Compare(trial, ip2) <= 0 {
fmt.Printf("%v is between %v and %v/n", trial, ip1, ip2)
return true
}
fmt.Printf("%v is NOT between %v and %v/n", trial, ip1, ip2)
return false
}
func main() {
check("1.2.3.4")
check("216.14.49.185")
check("1::16")
}

Lo que produce

1.2.3.4 is NOT between 216.14.49.184 and 216.14.49.191
216.14.49.185 is between 216.14.49.184 and 216.14.49.191
1::16 is not an IPv4 address

Answer 5

Pagué el código de un ejemplo de C # encontrado aquí: https://.com/a/2138724/1655418

Y por alguna razón, termina siendo 1 ms más rápido que la solución de Nick.

Mi pregunta era por la forma "más rápida", así que pensé en publicar la mía y ver qué pensaba la comunidad.

package iptesting
import (
"fmt"
"testing"
"net"
"time"
"bytes"
)
func TestIPRangeTime(t *testing.T) {
lowerBytes := net.ParseIP("216.14.49.184").To4()
upperBytes := net.ParseIP("216.14.49.191").To4()
inputBytes := net.ParseIP("216.14.49.184").To4()
startTime := time.Now()
for i := 0; i < 27000; i++ {
IsInRange(inputBytes, lowerBytes, upperBytes)
}
endTime := time.Now()
fmt.Println("ELAPSED time port: ", endTime.Sub(startTime))
lower := net.ParseIP("216.14.49.184")
upper := net.ParseIP("216.14.49.191")
trial := net.ParseIP("216.14.49.184")
startTime = time.Now()
for i := 0; i < 27000; i++ {
IsInRange2(trial, lower, upper)
}
endTime = time.Now()
fmt.Println("ELAPSED time bytescompare: ", endTime.Sub(startTime))
}
func IsInRange2(trial net.IP, lower net.IP, upper net.IP) bool {
if bytes.Compare(trial, lower) >= 0 && bytes.Compare(trial, upper) <= 0 {
return true
}
return false
}
func IsInRange(ip []byte, lower []byte, upper []byte) bool {
//fmt.Printf("given ip len: %d/n", len(ip))
lowerBoundary := true
upperBoundary := true
for i := 0; i < len(lower) && (lowerBoundary || upperBoundary); i++ {
if lowerBoundary && ip[i] < lower[i] || upperBoundary && ip[i] > upper[i] {
return false
}
if ip[i] == lower[i] {
if lowerBoundary {
lowerBoundary = true
} else {
lowerBoundary = false
}
//lowerBoundary &= true
} else {
lowerBoundary = false
//lowerBoundary &= false
}
if ip[i] == upper[i] {
//fmt.Printf("matched upper/n")
if upperBoundary {
upperBoundary = true
} else {
upperBoundary = false
}
//upperBoundary &= true
} else {
upperBoundary = false
//upperBoundary &= false
}
}
return true
}

Mis resultados:

=== RUN TestIPRangeTime
ELAPSED time port: 1.0001ms
ELAPSED time bytescompare: 2.0001ms
--- PASS: TestIPRangeTime (0.00 seconds)
=== RUN TestIPRangeTime
ELAPSED time port: 1ms
ELAPSED time bytescompare: 2.0002ms
--- PASS: TestIPRangeTime (0.00 seconds)
=== RUN TestIPRangeTime
ELAPSED time port: 1.0001ms
ELAPSED time bytescompare: 2.0001ms
--- PASS: TestIPRangeTime (0.00 seconds)
=== RUN TestIPRangeTime
ELAPSED time port: 1.0001ms
ELAPSED time bytescompare: 2.0001ms
--- PASS: TestIPRangeTime (0.00 seconds)