IP Address

[jsun9]

I have lots of salesmen that go all over the place and use 1001 different ISPs. I need to write a program that checks their IP and modifies their settings on the fly. How can I change the IP address of certain adapters? I searched the forums and looked through the registry and nothing comes up in either. Any ideas?

Thanks!

[randem]

jsun9

What you need is a Client/Server approach. You need to have a program running on each saleman's pc that will respond to a command you send it while online and do what is neccessary.

What do you mean change the IP Address of certain adapters?

[jsun9]

The client server approach would not work since they can't get to the internet in the first place.

Many salesman have multiple adapters like dial up, vpn and local area connection, etc. I need to make sure i'm changing the local area connection and not dial up, etc..

[plenderj]

Why would you need to change their IPs?

[randem]

jsun9

Each pc can have multiple adapters. You probably want to find the active one and get that IP. You can get the Active IP by using the Winsock control. You could aslo try this from the API-Guide:

'This project requires the following components:
' - a form (Form1) with a textbox (Text1, Multiline=True)
'   and a command button (Command1)
' - a module (Module1)
 
'in Form1:
Private Sub Command1_Click()
    Module1.Start
End Sub
 
'In Module1:
 
'******************************************************************
'Created By Verburgh Peter.
' 07-23-2001
' [email][email protected][/email]
'-------------------------------------
'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..
 
Type IPINFO
     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
 
Type MIB_IPADDRTABLE
    dEntrys As Long   'number of entries in the table
    mIPInfo(MAX_IP) As IPINFO  'array of IP address entries
End Type
 
Type IP_Array
    mBuffer As MIB_IPADDRTABLE
    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()
Form1.Show
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
Dim Listing As MIB_IPADDRTABLE
 
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 & "   IP addresses found on your PC !!" & 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 & "IP address                   : " & ConvertAddressToString(Listing.mIPInfo(Tel).dwAddr) & vbCrLf
         Form1.Text1 = Form1.Text1 & "IP Subnetmask            : " & ConvertAddressToString(Listing.mIPInfo(Tel).dwMask) & vbCrLf
         Form1.Text1 = Form1.Text1 & "BroadCast IP address  : " & ConvertAddressToString(Listing.mIPInfo(Tel).dwBCastAddr) & vbCrLf
         Form1.Text1 = Form1.Text1 & "**************************************" & vbCrLf
    Next
 
'MsgBox ConvertAddressToString(Listing.mIPInfo(1).dwAddr)
Exit Sub
END1:
MsgBox "ERROR"
End Sub

[jsun9]

thanks for the help randem.

does anyone know how to actually modify the IPs?

[Ogmius]

We have something similar at my job, you might want to try an application called netswitcher

http://www.netswitcher.com

it works really well, as a matter of fact I use it for myself when I go to client sites

Very easy to use and configure, and very simple for an end user who may not know everything about everything when it comes to networking

[jsun9]

that's pretty much exactly what I want to do.. but.. i still want to know how they do it. that program is still way to complicated for my salesmen.............

anyone know how to do this?????