FreeLists / openbeosnetteam / [openbeosnetteam] Re: DHCP Client needed, what would stand in the way?

["Bryan Bates" <bryanbates@xxxxxxxxxxxx>]

On Sat, 19 Jul 2003 15:43:24 GMT, "Philippe Houdoin"
<philippe.houdoin@xxxxxxx> said:
> > I'm interested in getting a DHCP/BOOTP client (and eventually server)
> > going under OBOS; is there anything that's "in the way" right now? 
> 
> I don't think so.
> Thanks to volunteer !
> ;-)
> 
> > Any necessary stuff in libnet or elsewhere not done yet?
> 
> Sure. I don't really know what's the best way to implement dhcp (client 
> side at last).
> Guess we'll need:
> - a bootp/dhcp kernel protocol module, listening incoming bootp packets 
> and handling 
> leases expiration.
> - enhance interfaces support to accept dynamic IP address setting, thru 
> previous module.
> - to modify ifconfig to turn on/off this dynamic IP address support for 
> an interface.
> 
> But I don't look deeply on DHCP/BOOTP, so that just guessing...
> 
> -Philippe
> 

Actually what I was thinking was more along the lines of a userland app
that would call ifconfig to configure the interface based on the DHCP
info. However, I'm *really* new to this, so I'm open to suggestions. I
was also going to look at the dhcpcd source for Linux, but in looking at
the license info, it's GPL'd. Nothing against the GPL, but we're working
with the MIT-style license, so I thought it might be best not to look
(and thus not have to credit it.) Fortunatly RFC 2131 (the current
primary one for DHCP) is rather thorough about what exactly should happen
between client and server.

My basic plan is as follows:
    1) Figure out what network device we're using.
    2) Start following the RFC's comm tree. DHCPDISCOVER, DHCPACK, get an
    address, check it, and then apply it.
    3) Wait until the proper time to start renewing (would it be easiest
    to implement as a daemon that slept until it was time to renew?)
    AND/OR
    4) DHCPRELEASE the address when shutting down.

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> 
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> 
-- 
  Bryan Bates
  bryanbates@xxxxxxxxxxxx

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