[Bug 733] Support for "secs" in DHCP client

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=733





--- Comment #6 from Denys Vlasenko <vda.linux at googlemail.com>  2010-04-04 20:30:52 UTC ---
> "that it is being used to detect failed DHCP servers."

How? I cannot imagine how "seconds elapsed" field is useful for this.

RFC 2131 does not seem to require this field to be set.
But if it is set to nonzero, RFC says:

    "To help
     ensure that any BOOTP relay agents forward the DHCPREQUEST message
     to the same set of DHCP servers that received the original
     DHCPDISCOVER message, the DHCPREQUEST message MUST use the same
     value in the DHCP message header's 'secs' field and be sent to the
     same IP broadcast address as the original DHCPDISCOVER message."

So it becomes even less clear what this field is meant to contain... So far
leaving it at zero looks like simplest and smallest (in code size terms) course
of action.

Can you reproduce your complete conversation with the person requesting this?
You can post it here and/or on the mailing list.


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