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  Visual Basic    (Redes/Comunicações)

Título da Dica:  Pega a tabela de endereco IP
Postada em 21/12/2003 por Andre            
'Essa Dica requer os seguintes componente
' - Um form (Form1) com um textbox (Text1, Multiline=True)
'   e um Botao(Command1)
' - a module (Module1)

'in Form1:
Private Sub Command1_Click()
End Sub

'No modulo:

'Created By Verburgh Peter.
' 07-23-2001
'With this small application , you can detect the IP's installed on your computer,
'including subnet mask , BroadcastAddr..
'I've wrote this because i've a programm that uses the winsock control, but,
'if you have multiple ip's  installed on your pc , you could get by using the Listen
' method the wrong ip ...
'Because Winsock.Localip => detects the default ip installed on your PC ,
' and in most of the cases it could be the LAN (nic) not the WAN (nic)
'So then you have to use the Bind function ,to bind to your right ip..
'but how do you know & find that ip ?
'you can find it now by this appl.. it check's in the api.. IP Table..

Const MAX_IP = 5   'To make a buffer... i dont think you have more than 5 ip on your pc..

     dwAddr As Long   ' IP address
     dwIndex As Long '  interface index
     dwMask As Long ' subnet mask
     dwBCastAddr As Long ' broadcast address
     dwReasmSize  As Long ' assembly size
     unused1 As Integer ' not currently used
     unused2 As Integer '; not currently used
End Type

    dEntrys As Long   'number of entries in the table
    mIPInfo(MAX_IP) As IPINFO  'array of IP address entries
End Type

Type IP_Array
    BufferLen As Long
End Type

Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Public Declare Function GetIpAddrTable Lib "IPHlpApi" (pIPAdrTable As Byte, pdwSize As Long, ByVal Sort As Long) As Long
Sub main()
End Sub

'converts a Long  to a string
Public Function ConvertAddressToString(longAddr As Long) As String
    Dim myByte(3) As Byte
    Dim Cnt As Long
    CopyMemory myByte(0), longAddr, 4
    For Cnt = 0 To 3
        ConvertAddressToString = ConvertAddressToString + CStr(myByte(Cnt)) + "."
    Next Cnt
    ConvertAddressToString = Left$(ConvertAddressToString, Len(ConvertAddressToString) - 1)
End Function

Public Sub Start()
Dim Ret As Long, Tel As Long
Dim bBytes() As Byte

Form1.Text1 = ""

On Error GoTo END1
    GetIpAddrTable ByVal 0&, Ret, True

    If Ret <= 0 Then Exit Sub
    ReDim bBytes(0 To Ret - 1) As Byte
    'retrieve the data
    GetIpAddrTable bBytes(0), Ret, False
    'Get the first 4 bytes to get the entry's.. ip installed
    CopyMemory Listing.dEntrys, bBytes(0), 4
    'MsgBox "IP's found : " & Listing.dEntrys    => Founded ip installed on your PC..
    Form1.Text1 = Listing.dEntrys & "   Configuracoes de IP no Seu Computador !!" & vbCrLf
    Form1.Text1 = Form1.Text1 & "--------------------------------------------------------------------------" & vbCrLf
    For Tel = 0 To Listing.dEntrys - 1
        'Copy whole structure to Listing..
       ' MsgBox bBytes(tel) & "."
        CopyMemory Listing.mIPInfo(Tel), bBytes(4 + (Tel * Len(Listing.mIPInfo(0)))), Len(Listing.mIPInfo(Tel))
         Form1.Text1 = Form1.Text1 & "Endereco IP" & vbTab & vbTab & ": " & ConvertAddressToString(Listing.mIPInfo(Tel).dwAddr) & vbCrLf
         Form1.Text1 = Form1.Text1 & "Mascara SubRede" & vbTab & vbTab & ": " & ConvertAddressToString(Listing.mIPInfo(Tel).dwMask) & vbCrLf
         Form1.Text1 = Form1.Text1 & "Endereco de BroadCast" & vbTab & ": " & ConvertAddressToString(Listing.mIPInfo(Tel).dwBCastAddr) & vbCrLf
         Form1.Text1 = Form1.Text1 & "**************************************" & vbCrLf

Exit Sub
MsgBox "ERROR"

End Sub

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