[En-Nut-Discussion] DHCP renewal

[Joe Doubek]

  Can anyone guide me on how I might go about renewing the DHCP address
on demand. It appears the NutDhcpIfConfig 

Function looks for both a valid mac and an ip address/mask of zero in
EEPROM before it will start the DHCP thread. 

Currently I am attempting something like this, where mac is a valid mac
addr:

 

    confnet.cdn_cip_addr = 0;

    confnet.cdn_ip_mask = 0; 

    NutNetSaveConfig();   /* store an invalid ip addr and mask in EEPROM
*/

    if (NutDhcpIfConfig("eth0", mac, DHCP_TIMEOUT)) 

    {

        printf("DHCP server not found...\n");

        return -1;

    }

 

   I do this after I have successfully received a DHCP address and I am
just sitting in an idle state. When I do this the DHCP 

thread never appears to attempt to obtain an address (watching ethereal
I never see a DHCP discover), and eventually DHCP 

times out. Any ideas?

 

-Joe

 

 

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