Masuit.Tools/Masuit.Tools.Abstractions/Extensions/BaseType/IPAddressExtensions.cs

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace Masuit.Tools
{
    public static class IPAddressExtensions
    {
        /// <summary>
        /// 判断IP是否是私有地址
        /// </summary>
        /// <param name="myIPAddress"></param>
        /// <returns></returns>
        public static bool IsPrivateIP(this IPAddress myIPAddress)
        {
            if (IPAddress.IsLoopback(myIPAddress)) return true;

            if (myIPAddress.AddressFamily == AddressFamily.InterNetwork)
            {
                byte[] ipBytes = myIPAddress.GetAddressBytes();

                // 10.0.0.0/24
                if (ipBytes[0] == 10)
                {
                    return true;
                }
                // 169.254.0.0/16
                if (ipBytes[0] == 169 && ipBytes[1] == 254)
                {
                    return true;
                }
                // 172.16.0.0/16
                if (ipBytes[0] == 172 && ipBytes[1] == 16)
                {
                    return true;
                }
                // 192.168.0.0/16
                if (ipBytes[0] == 192 && ipBytes[1] == 168)
                {
                    return true;
                }
            }
            return false;
        }
    }
}