IP address control

[Edgar TH]

Hello,
I need to have a control that takes and validates IP address. Is there a predefined control type that I can use? (or I have to have a text control and do the validation by myself)
Thanks,

Edgar TH

[scomack]

It might be easier to use 4 numeric fields.  That way, the data is forced to be numeric at least.

Then use a sprintf statement to put them into a string with the dots between the numbers.

sprintf(StringName, "%i.%i.%i.%i", IP_Addr1, IP_Addr2, IP_Addr3, IP_Addr4);

[cdk52]

Hi Edgar.

I had the same problem a few years back.

I used a string control, with some simple logic in the callback:

// String control callback
// - validate & reformat an IP address string
int CVICALLBACK IPAddressCB (int panel, int control, int event,
        void *callbackData, int eventData1, int eventData2)
{
 unsigned n1, n2, n3, n4;
 int i, items;
 char ip[20], IPAddress[20] = "Invalid!";

 switch (event)
  {
  case EVENT_COMMIT:
   GetCtrlVal (panel, control, ip);
   // _Rough_ check for valid IP address string
   items = Scan (ip, "%i[u].%i[u].%i[u].%i[u]",
       &n1, &n2, &n3, &n4);
   if ((items == 4) &&
    (n1 <= 0xE0) && // Class A, B or C
    (n2 <= 255)  &&
    (n3 <= 255)  &&
    (n4 <= 255))
    Fmt (IPAddress, "%i.%i.%i.%i", n1, n2, n3, n4);

   SetCtrlVal (panel, control, IPAddress);

   break;
  }

 return 0;
}

Regards,
Colin.

Message Edited by cdk52 on 08-24-2006 06:15 PM

[Edgar TH]

Thank you very much. It works great. (I expected Labwindows to provide a specific control type for IP addresses like .NET)

[menchar]

Especially since we paid for an "Internet library"  and ".NET library" capability.