Re: MAC Address

[Scott Klement <klemscot@xxxxxxxxxxxx>]

> Is there any way to tell the MAC address of the client that is connected
> to my RPG program?  I need to be able to determine if that client has
> connected previously and I can't use the IP address because of DHCP.  I
> am open to other suggestions as well.

You can do that, but bear in mind that the MAC address is only relevant if
your clients will always be on the same ethernet segment as your iSeries
is.

Here's what you'll need to do to get the MAC address:

   1)  Get the connected computer's IP address.  You can use the QDCRDEVD
         API with format DEVD0600 to do that.
   2)  Get the "line name" of your ethernet card.  I've always hard-coded
         this, since we have only one ethernet card, but I imagine
         there's a way to get this with APIs as well?   Mines LIN051 :)
   3)  Call the QtocLstPhyIfcARPTbl API.  This lists the ARP table for
         a given ethernet card to a UsrSpc.   (ARP = Address Resolution
         Protocol... an ARP table corresponds MAC addresses with IP
         addresses)
   4)  Loop through the UsrSpc and find the entry that matches the IP
         address from step 1.  The MAC address will be in the
         "Physical address" field of the ARPT0100 format.

Let me know if you need some sample code...