asp检查ip地址是否为私有/内网ip地址源代码。
内网/私有IP地址网段如下,还有127开头的回环地址:
10.0.0.0-10.255.255.255
172.16.0.0—172.31.255.255
192.168.0.0-192.168.255.255
实现代码:
01 <%
02 function IpToNumber(ip)'IP地址转为数字
03 arr=split(ip,".")
04 IpToNumber=256*256*256*clng(arr(0))+256*256*clng(arr(1))+256*clng(arr(2))+clng(arr(3))
05 end function
06 function IsPrivateIp(ip)'判断给定的IP地址是否内网/私有ip地址
07 if instr(ip,"127.")=1 then'回环IP地址
08 IsPrivateIp=true:exit function
09 end if
10 ABegin=IpToNumber("10.0.0.0"):AEnd=IpToNumber("10.255.255.255")'A类私有IP地址
11 BBegin=IpToNumber("172.16.0.0"):BEnd=IpToNumber("172.31.255.255")'B类私有IP地址
12 CBegin=IpToNumber("192.168.0.0"):CEnd=IpToNumber("192.168.255.255")'C类私有IP地址
13 IpNum=IpToNumber(ip)
14 IsPrivateIp=(ABegin<=IpNum and IpNum<=AEnd) or (BBegin<=IpNum and IpNum<=BEnd) or (CBegin<=IpNum and IpNum<=CEnd)
15 end function
16 Response.Write IsPrivateIp("11.255.255.255")&"<br>"'false
17 Response.Write IsPrivateIp("182.255.255.255")&"<br>"'false
18 Response.Write IsPrivateIp("172.30.255.255")&"<br>"'true
19 Response.Write IsPrivateIp("192.168.205.2")&"<br>"'true
20 Response.Write IsPrivateIp("127.168.205.2")'true
21 %>
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