Question

ASP中获得客户端MAC地址

如何使用ASP获的客户端的MAC地址？主要用于验证客户端的身份。网上介绍了不少方法，但本人试验过后都不行，哪位高手有办法不吝赐教，希望写的尽可能详细些。

Answer 1

很简单取得对方IP后,将其传入下面函数GetMACAddress即可得到string类型的MAC地址:

<%
Private Const NCBASTAT = &H33
Private Const NCBNAMSZ = 16
Private Const HEAP_ZERO_MEMORY = &H8
Private Const HEAP_GENERATE_EXCEPTIONS = &H4
Private Const NCBRESET = &H32

Private Type NCB
ncb_command As Byte ''Integer
ncb_retcode As Byte ''Integer
ncb_lsn As Byte ''Integer
ncb_num As Byte '' Integer
ncb_buffer As Long ''String
ncb_length As Integer
ncb_callname As String * NCBNAMSZ
ncb_name As String * NCBNAMSZ
ncb_rto As Byte ''Integer
ncb_sto As Byte '' Integer
ncb_post As Long
ncb_lana_num As Byte ''Integer
ncb_cmd_cplt As Byte ''Integer
ncb_reserve(9) As Byte '' Reserved, must be 0
ncb_event As Long
End Type
Private Type ADAPTER_STATUS
adapter_address(5) As Byte ''As String * 6
rev_major As Byte ''Integer
reserved0 As Byte ''Integer
adapter_type As Byte ''Integer
rev_minor As Byte ''Integer
duration As Integer
frmr_recv As Integer
frmr_xmit As Integer
iframe_recv_err As Integer
xmit_aborts As Integer
xmit_success As Long
recv_success As Long
iframe_xmit_err As Integer
recv_buff_unavail As Integer
t1_timeouts As Integer
ti_timeouts As Integer
Reserved1 As Long
free_ncbs As Integer
max_cfg_ncbs As Integer
max_ncbs As Integer
xmit_buf_unavail As Integer
max_dgram_size As Integer
pending_sess As Integer
max_cfg_sess As Integer
max_sess As Integer
max_sess_pkt_size As Integer
name_count As Integer
End Type
Private Type NAME_BUFFER
name As String * NCBNAMSZ
name_num As Integer
name_flags As Integer
End Type
Private Type ASTAT
adapt As ADAPTER_STATUS
NameBuff(30) As NAME_BUFFER
End Type

Private Declare Function Netbios Lib "netapi32.dll" _
(pncb As NCB) As Byte
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" ( _
hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
Private Declare Function GetProcessHeap Lib "kernel32" () As Long
Private Declare Function HeapAlloc Lib "kernel32" _
(ByVal hHeap As Long, ByVal dwFlags As Long, _
ByVal dwBytes As Long) As Long
Private Declare Function HeapFree Lib "kernel32" (ByVal hHeap As Long, _
ByVal dwFlags As Long, lpMem As Any) As Long

Public Function GetMACAddress(sIP As String) As String
Dim sRtn As String
Dim myNcb As NCB
Dim bRet As Byte

Dim aIP() As String
Dim x As Long
Dim nIP As String

If InStr(sIP, ".") = 0 Then
GetMACAddress = "无效的IP地址."
Exit Function
End If

aIP = Split(sIP, ".", -1, vbTextCompare)
If UBound(aIP()) <> 3 Then
GetMACAddress = "无效的IP地址."
Exit Function
End If

For x = 0 To UBound(aIP())
If Len(aIP(x)) > 3 Then
GetMACAddress = "无效的IP地址"
Exit Function
End If

If IsNumeric(aIP(x)) = False Then
GetMACAddress = "无效的IP地址"
Exit Function
End If

If InStr(aIP(x), ",") <> 0 Then
GetMACAddress = "无效的IP地址"
Exit Function
End If

If CLng(aIP(x)) > 255 Then
GetMACAddress = "无效的IP地址"
Exit Function
End If

If nIP = "" Then
nIP = String(3 - Len(aIP(x)), "0") & aIP(x)
Else
nIP = nIP & "." & String(3 - Len(aIP(x)), "0") & aIP(x)
End If
Next

sRtn = ""
myNcb.ncb_command = NCBRESET
bRet = Netbios(myNcb)
myNcb.ncb_command = NCBASTAT
myNcb.ncb_lana_num = 0
myNcb.ncb_callname = nIP & Chr(0)

Dim myASTAT As ASTAT, tempASTAT As ASTAT
Dim pASTAT As Long
myNcb.ncb_length = Len(myASTAT)

pASTAT = HeapAlloc(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS Or HEAP_ZERO_MEMORY, myNcb.ncb_length)
If pASTAT = 0 Then
GetMACAddress = "memory allcoation failed!"
Exit Function
End If

myNcb.ncb_buffer = pASTAT
bRet = Netbios(myNcb)

If bRet <> 0 Then
GetMACAddress = "不能从当前IP地址获得MAC，当前IP地址: " & sIP
Exit Function
End If

CopyMemory myASTAT, myNcb.ncb_buffer, Len(myASTAT)

Dim sTemp As String
Dim i As Long
For i = 0 To 5
sTemp = Hex(myASTAT.adapt.adapter_address(i))
If i = 0 Then
sRtn = IIf(Len(sTemp) < 2, "0" & sTemp, sTemp)
Else
sRtn = sRtn & Space(1) & IIf(Len(sTemp) < 2, "0" & sTemp, sTemp)
End If
Next
HeapFree GetProcessHeap(), 0, pASTAT
GetMACAddress = sRtn
End Function
%>

Answer 2

<%
dim remoteaddr
if Request.ServerVariables("HTTP_X_FORWARDED_FOR")=empty then
remoteaddr=Request.ServerVariables("REMOTE_ADDR")
else
remoteaddr=Request.ServerVariables("HTTP_X_FORWARDED_FOR")
end if
Response.Write(GetMac(remoteaddr))
'由于读取某IP的网卡MAC地址
'本程序通过调用arp命令通过查询本机arp表读取特定IP的MAC地址
'使用本程序需注意以下事项：
'本程序需要“WSCRIPT.SHELL”和“Scripting.FileSystemObject”两个组件，请确保您的服务器可以正常使用这两个组件
' 本程序需要调用cmd.exe程序，请确保IIS来宾帐号对程序有访问权限。
' 本程序需要临时文件保存结果，请确保IIS来宾帐号对临时目录有写权限。
function GetMac(IP)
On Error Resume Next
Dim oScript
Dim oFileSys, oFile
Dim All, szTempFile,ipc,phyc,typec
Dim TempPath
Set oScript = Server.CreateObject("WSCRIPT.SHELL")
Set oFileSys = Server.CreateObject("Scripting.FileSystemObject")
TempPath="d:/temp/" '临时目录
szTempFile = TempPath & oFileSys.GetTempName() ' 获取临时文件名
Call oScript.Run ("cmd.exe /c ping -n 2 " & IP, 0, True) '保证arp表中有此IP
Call oScript.Run ("cmd.exe /c arp -a " & IP & " > " & szTempFile, 0, True)
Set oFile = oFileSys.OpenTextFile (szTempFile, 1, False, 0)
All=oFile.ReadAll()
oFile.Close
If (IsObject(oFile)) Then
Call oFileSys.DeleteFile(szTempFile, True)
End If
arr = Split(All, vbCrLf)
If UBound(arr) = 4 Then
ipc = InStr(1, arr(2), "Internet Address")
phyc = InStr(1, arr(2), "Physical Address")
typec = InStr(1, arr(2), "Type")
If typec > phyc And phyc > ipc And ipc > 0 Then
GetMac=Ucase(Trim(CStr(Mid(arr(3), phyc, typec - phyc))))
End If
End If
End function
%>