[En-Nut-Discussion] Use DHCP to configure ethernut IPaddr without renewal of IPaddr?

[Dusan Ferbas]

Hi Erik,

removal is not a good idea. In that case, you will go against RFC. 
See ftp://ftp.rfc-editor.org/in-notes/rfc2131.txt, 4.4.5.

It should be done as described in 2.2. (The client may ask for a 
permanent assignment by asking for an infinite lease).
See 3.3 for details on this value.
But you are not save (Even when assigning "permanent" addresses, a 
server may choose to give out lengthy but non-infinite leases ...).

It is an IP Address Lease Time option (0x33, 51). See 
http://www.ietf.org/rfc/rfc2132.txt?number=2132, 9.2.

---------
So you can try to add following to DhcpSendRequest(), I think before 
DhcpAddParmReqOption() call.
         {
         long    lease_time = -1;
         optlen += DhcpAddOption(op + optlen, DHCPOPT_LEASETIME, 
&lease_time , sizeof(lease_time ));
         }

Maybe also to DhcpBroadcastDiscover() , similar position.

At 12:00 4.7.2008, en-nut-discussion-request at egnite.de wrote:
>From: Erik L <erik.lindstein at gmail.com>
>Date: Fri, 4 Jul 2008 01:50:00 -0700 (PDT)
...
>Is there any other way to fix this then edit the dhcp.c source and remove
>the renewal features?
>
>Regards/Erik

Dusan