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Dicas
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Visual Basic (Internet)
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Título da Dica: RETORNAR ENDEREÇO DE UMA MÁQUINA REMOTA
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Postada em 5/4/2006 por JOHNNY
talk2cod@hotmail.com
FAÇA DOIS TEXTBOX E UM COMMMANDBUTTON.
Option Explicit
Private Const NO_ERROR = 0
Private Declare Function inet_addr Lib "wsock32.dll" _
(ByVal s As String) As Long
Private Declare Function SendARP Lib "iphlpapi.dll" _
(ByVal DestIP As Long, _
ByVal SrcIP As Long, _
pMacAddr As Long, _
PhyAddrLen As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" _
Alias "RtlMoveMemory" _
(dst As Any, _
src As Any, _
ByVal bcount As Long)
Private Sub Form_Load()
Text1.Text = "192.168.1.101"
Text2.Text = ""
Command1.Caption = "RETORNAR ENDEREÇO DE MÁQUINA REMOTA"
End Sub
Private Sub Command1_Click()
Dim sRemoteMacAddress As String
If Len(Text1.Text) > 0 Then
If GetRemoteMACAddress(Text1.Text, sRemoteMacAddress) Then
Text2.Text = sRemoteMacAddress
Else
Text2.Text = "(SendARP call failed)"
End If
End If
End Sub
Private Function GetRemoteMACAddress(ByVal sRemoteIP As String, _
sRemoteMacAddress As String) As Boolean
Dim dwRemoteIP As Long
Dim pMacAddr As Long
Dim bpMacAddr() As Byte
Dim PhyAddrLen As Long
Dim cnt As Long
Dim tmp As String
dwRemoteIP = inet_addr(sRemoteIP)
If dwRemoteIP <> 0 Then
PhyAddrLen = 6
If SendARP(dwRemoteIP, 0&, pMacAddr, PhyAddrLen) = NO_ERROR Then
If pMacAddr <> 0 And PhyAddrLen <> 0 Then
ReDim bpMacAddr(0 To PhyAddrLen - 1)
CopyMemory bpMacAddr(0), pMacAddr, ByVal PhyAddrLen
For cnt = 0 To PhyAddrLen - 1
If bpMacAddr(cnt) = 0 Then
tmp = tmp & "00-"
Else
tmp = tmp & Hex$(bpMacAddr(cnt)) & "-"
End If
Next
If Len(tmp) > 0 Then
sRemoteMacAddress = Left$(tmp, Len(tmp) - 1)
GetRemoteMACAddress = True
End If
Exit Function
Else
GetRemoteMACAddress = False
End If
Else
GetRemoteMACAddress = False
End If
Else
GetRemoteMACAddress = False
End If
End Function
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