ASP编码教程:实现检查ip地址是否为内网或者私有ip地址的代码分享
2015-4-14编辑:ljnbset
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:
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<%
function IpToNumber(ip) 'IP地址转为数字
arr=split(ip, "." )
IpToNumber=256*256*256*clng(arr(0))+256*256*clng(arr(1))+256*clng(arr(2))+clng(arr(3))
end function
function IsPrivateIp(ip) '判断给定的IP地址是否内网/私有ip地址
if instr(ip, "127." )=1 then '回环IP地址
IsPrivateIp=true:exit function
end if
ABegin=IpToNumber( "10.0.0.0" ):AEnd=IpToNumber( "10.255.255.255" ) 'A类私有IP地址
BBegin=IpToNumber( "172.16.0.0" ):BEnd=IpToNumber( "172.31.255.255" ) 'B类私有IP地址
CBegin=IpToNumber( "192.168.0.0" ):CEnd=IpToNumber( "192.168.255.255" ) 'C类私有IP地址
IpNum=IpToNumber(ip)
IsPrivateIp=(ABegin<=IpNum and IpNum<=AEnd) or (BBegin<=IpNum and IpNum<=BEnd) or (CBegin<=IpNum and IpNum<=CEnd)
end function
Response.Write IsPrivateIp( "11.255.255.255" )& " 'false
Response.Write IsPrivateIp( "182.255.255.255" )& " 'false
Response.Write IsPrivateIp( "172.30.255.255" )& " 'true
Response.Write IsPrivateIp( "192.168.205.2" )& " 'true
Response.Write IsPrivateIp( "127.168.205.2" ) 'true
%>
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