' 通过上一步的验证，现在应该要检查小点是否有3个
If dot_count <> &H03 Then
Valid_IP = False
Exit Function
End If
' 一切正常，那么该IP为正确的IP地址
Valid_IP = True
End Function
'────────────────────────────────
' 转换一个数值为IP
Public Function CStringIP(ByVal anNewIP)
Dim lsResults
Dim lnTemp
Dim lnIndex
For lnIndex = &H03 To &H00 Step -&H01
lnTemp = Int(anNewIP / (&H100 ^ lnIndex))
lsResults = lsResults & lnTemp & "."
anNewIP = anNewIP - (lnTemp * (&H100 ^ lnIndex))
Next
lsResults = Left(lsResults, Len(lsResults) - &H01)
CStringIP = lsResults
End function
'────────────────────────────────
' 转换一个IP到数值
Public Function CLongIP(ByVal asNewIP)
Dim lnResults
Dim lnIndex
Dim lnIpAry
lnIpAry = Split(asNewIP, ".", &H04)
For lnIndex = &H00 To &H03
if Not lnIndex = &H03 Then
lnIpAry(lnIndex) = lnIpAry(lnIndex) * (&H100 ^ (&H03 - lnIndex))
End if
lnResults = lnResults + lnIpAry(lnIndex)
Next
CLongIP = lnResults
End function
'────────────────────────────────
' 取Client IP
Public Function GetClientIP()
dim uIpAddr
' 本函数参考webcn.Net/AspHouse 文献<取真实的客户IP>
uIpAddr = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
If uIpAddr = "" Then uIpAddr = Request.ServerVariables("REMOTE_ADDR")
GetClientIP = uIpAddr
uIpAddr = ""
End function
'────────────────────────────────
' 读取IP所在地的信息
Public function GetIpAddrInfo()
Dim tmpIpAddr
Dim IpAddrVal
Dim ic,charSpace
Dim tmpSQL
charSpace = ""
IpAddrVal = IpAddress
If Not Valid_IP(IpAddrVal) Then
GetIpAddrInfo =NULL
Exit Function
End If
'将IP字符串劈开成数组好进行处理
tmpIpAddr = Split(IpAddrVal,".",-1,1)
For ic = &H00 To Ubound(tmpIpAddr)
'补位操作,保证每间隔满足3个字符
Select Case Len(tmpIpAddr(ic))
Case &H01 :charSpace = "00"
Case &H02 :charSpace = "0"
Case Else :charSpace = ""
End Select
tmpIpAddr(ic) = charSpace & tmpIpAddr(ic)
Next
IpAddrVal = tmpIpAddr(&H00) & "." & tmpIpAddr(&H01) & "." & tmpIpAddr(&H02) & "." & tmpIpAddr(&H03)
'以下为查询，IP地址库基于《追捕》的IP数据库,感谢"冯志宏"先生的贡献
'库结构如下：
'CREATE TABLE [dbo].[wry] (
' [STARTIP] [nvarchar] (17) COLLATE Chinese_PRC_CI_AS NULL , --起始IP段
' [ENDIP] [nvarchar] (17) COLLATE Chinese_PRC_CI_AS NULL , --终止IP段
' [COUNTRY] [nvarchar] (16) COLLATE Chinese_PRC_CI_AS NULL , --国家或者地区
' [LOCAL] [nvarchar] (54) COLLATE Chinese_PRC_CI_AS NULL , --本地地址
' [THANK] [nvarchar] (23) COLLATE Chinese_PRC_CI_AS NULL --感谢修正IP地址用户姓名
') ON [PRIMARY]
'经过分析库的数据存放结构，总结出准确的查询方法，具体看下面的查询过程
tmpSQL = "select * from wry where (startIP<='" & IpAddrVal & "') and (ENDIP>='" & IpAddrVal & "') " & _
" and left(startIP," & Len(tmpIpAddr(&H00)) & ") = '" & tmpIpAddr(&H00) & "'" & _
" and left(endip," & Len(tmpIpAddr(&H00)) & ")='" & tmpIpAddr(&H00) & "'"
charSpace = GetDbIpInfo(tmpSQL)
If Len(charSpace)=&H00 Then
GetIpAddrInfo = NULL
Else
GetIpAddrInfo = charSpace
End If
charSpace = Null
tmpSQL = Null
end function
'────────────────────────────────
' 返回数据查询的字符串
Private function GetDbIpInfo(byVal sql)
Dim OpenIpSearchRs
Dim result
Set OpenIpSearchRs = SQLExeCute(sql)
If Not OpenIpSearchRs.Eof Then
result = NullToSpace(OpenIpSearchRs("COUNTRY")) & "," & NullToSpace(OpenIpSearchRs("LOCAL")) & "," & NullToSpace(OpenIpSearchRs ("THANK"))
Else
result = NULL
End If
OpenIpSearchRs.Close
Set OpenIpSearchRs=Nothing
GetDbIpInfo = result
End function
'────────────────────────────────
' 将数据库空记录转换为空字符
Private function NullToSpace(byVal rsStr)
If isNull(rsStr) Then
NullToSpace = ""
Else
NullToSpace = Trim(rsStr)
End If
End Function
End Class
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