kami_itunes_june/AppleBatch_June.Utils/IpIsRange.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;

namespace AppleBatch_June.Utils
{
	public class IpIsRange
	{
		private static string[] AllowIPRanges = new string[3] { "10.0.0.0-10.255.255.255", "172.16.0.0-172.31.255.255", "192.168.0.0-192.168.255.255" };

		public static bool TheIpIsRange(string ip)
		{
			bool result = false;
			string[] allowIPRanges = AllowIPRanges;
			foreach (string ranges in allowIPRanges)
			{
				if (TheIpIsRangeStr(ip, ranges))
				{
					result = true;
					break;
				}
			}
			return result;
		}

		private static bool TheIpIsRangeStr(string ip, string ranges)
		{
			bool result = false;
			TryParseRanges(ranges, out var count, out var start_ip, out var end_ip);
			if (ip == "::1")
			{
				ip = "127.0.0.1";
			}
			try
			{
				IPAddress.Parse(ip);
			}
			catch (Exception)
			{
				throw new ApplicationException("要检测的IP地址无效");
			}
			if (count == 1 && ip == start_ip)
			{
				result = true;
			}
			else if (count == 2)
			{
				byte[] array = Get4Byte(start_ip);
				byte[] array2 = Get4Byte(end_ip);
				byte[] array3 = Get4Byte(ip);
				bool flag = true;
				for (int i = 0; i < 4; i++)
				{
					if (array3[i] > array2[i] || array3[i] < array[i])
					{
						flag = false;
						break;
					}
				}
				result = flag;
			}
			return result;
		}

		private static void TryParseRanges(string ranges, out int count, out string start_ip, out string end_ip)
		{
			string[] array = ranges.Split('-');
			if (array.Count() != 2 && array.Count() != 1)
			{
				throw new ApplicationException("IP范围指定格式不正确，可以指定一个IP，如果是一个范围请用“-”分隔");
			}
			count = array.Count();
			start_ip = array[0];
			end_ip = "";
			try
			{
				IPAddress.Parse(array[0]);
			}
			catch (Exception)
			{
				throw new ApplicationException("IP地址无效");
			}
			if (array.Count() == 2)
			{
				end_ip = array[1];
				try
				{
					IPAddress.Parse(array[1]);
				}
				catch (Exception)
				{
					throw new ApplicationException("IP地址无效");
				}
			}
		}

		private static byte[] Get4Byte(string ip)
		{
			string[] array = ip.Split('.');
			List<byte> list = new List<byte>();
			string[] array2 = array;
			foreach (string value in array2)
			{
				list.Add(Convert.ToByte(value));
			}
			return list.ToArray();
		}
	}
}