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IP地址分段计算 (转)

原创 网络安全 作者:amyz 时间:2007-11-16 18:50:15 0 删除 编辑
IP地址分段计算 (转)[@more@]

/* written by Jaron ,2000-01-10 */
/* 原出处:江都资讯网 .NET/">http://www.jiangdu.net */
/* 转载请注明出处和保留此版权信息 */
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/*相关文章:ASP?id=19652*/">http://www.csdn.net/Develop/read_article.asp?id=19652*/


在vbs中没有位操作,这样在一个页面中用到了js和vbs,并不好,如果用vbs也可以,不过罗嗦了一些,而且有一点注意,如果在vbs中split("202.102.29.6",","),会得到202,102,29三个数,得不到最后一个6,所以需要将ip换成split("202.102.29.6" & ".",",")
我用vbs做的,由于没有位操作,所以做得比较麻烦
<%
function ip2int(ipstr)
dim iptemp,max
iptemp = split(ipstr&".",".")
max = ubound(iptemp)
if max <> 4 then
exit function
end if

dim a,b,i
a = "&H"
for i = 0 to 3
b = Hex(iptemp(i))
if len(b) = 1 then
b = "0"&b
end if
a = a&b
next
ip2int = CLng(a)
end function

function int2ip(ip)
dim iptemp,a,ipstr,i,length
iptemp = Hex(ip)
length = 8 - len(iptemp)
for i = 1 to length
iptemp = "0" & iptemp
next
a = left(iptemp,2)
a = "&H" & a
i = CInt(a)
a = CStr(i)
ipstr = a & "."
a = mid(iptemp,3,2)
a = "&H" & a
i = CInt(a)
a = CStr(i)
ipstr = ipstr & a & "."
a = mid(iptemp,5,2)
a = "&H" & a
i = CInt(a)
a = CStr(i)
ipstr = ipstr & a & "."
a = right(iptemp,2)
a = "&H" & a
i = CInt(a)
a = CStr(i)
ipstr = ipstr & a
int2ip = ipstr
end function

dim testIP,testInt
testIP="202.102.29.6"
testInt = ip2int(testIP)
response.write testIP & " will be encoded to " & testInt & "
"
response.write testIP & " will be dencoded to " & int2ip(testInt) & "
"
%>


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