Re: DHCP client with minimal functionality and size

[Roy Marples <roy%marples.name@localhost>]

On Wed, 2008-01-16 at 16:10 +0000, David Brownlee wrote:
> On Wed, 16 Jan 2008, Roy Marples wrote:
> 
> >>> 2) It does not interact with WLAN keys in any way or form (and shouldn't
> >>> either imo)
> >>
> >> It should only be able to deal with link changes.
> >
> > Hmmmm. I disagree here. Link managers, such as wpa_supplicant, should
> > call a generic network script to say "link up/down" and then either
> > configure static ip or do dhcp.
> >
> > Gentoo uses this approach very well. Although I am slightly biased as I
> > wrote that part of Gentoo ;) This is going outside the scope of this
> > discussion though.
> 
>       Just to clarify - so in this model unplugging and replugging in an
>       ethernet cable would be expected to run a script which would kill
>       and potentially restart dhcpdc?
> 

Yes, as there is no guarantee the the cable you unplugged is the same
one you plug in. For example, you could be configuring your network
based on arpinging set gateways. Here's a sample config you could
achieve with this in Gentoo.

arping="192.168.0.1"
config_192168000001="192.168.0.99/24"
dns_servers_192168000001="192.168.0.1"
dns_domain_192168000001="foo.com"
config_bge0="arping"
fallback_bge0="dhcp"

Thanks

Roy