feat: fix IsAbroadIp() to return false for intranet IPs (#100)

Author: Copilot

ip/ip.go

@@ -14,7 +14,11 @@
 
 package ip
 
-import "fmt"
+import (
+	"fmt"
+
+	"github.com/casbin/caswaf/util"
+)
 
 func InitIpDb() {
 	err := Init("ip/17monipdb.dat")
@@ -24,6 +28,11 @@ func InitIpDb() {
 }
 
 func IsAbroadIp(ip string) bool {
+	// If it's an intranet IP, it's not abroad
+	if util.IsIntranetIp(ip) {
+		return false
+	}
+
 	info, err := Find(ip)
 	if err != nil {
 		fmt.Printf("error: ip = %s, error = %s\n", ip, err.Error())

util/network.go

@@ -14,7 +14,10 @@
 
 package util
 
-import "os"
+import (
+	"net"
+	"os"
+)
 
 var hostname = ""
 
@@ -30,3 +33,20 @@ func init() {
 func GetHostname() string {
 	return hostname
 }
+
+func IsIntranetIp(ip string) bool {
+	ipStr, _, err := net.SplitHostPort(ip)
+	if err != nil {
+		ipStr = ip
+	}
+
+	parsedIP := net.ParseIP(ipStr)
+	if parsedIP == nil {
+		return false
+	}
+
+	return parsedIP.IsPrivate() ||
+		parsedIP.IsLoopback() ||
+		parsedIP.IsLinkLocalUnicast() ||
+		parsedIP.IsLinkLocalMulticast()
+}