casdoor/util/network.go

// Copyright 2025 The Casdoor Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package util

import (
	"net"
)

func IsInternetIp(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.IsMulticast() && !parsedIP.IsUnspecified()
}

func IsHostIntranet(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()
}