lzma with TCP/IP and libertas driver... and still some room

[Dan Williams]

On Wed, 2006-10-04 at 10:26 -0400, Jim Gettys wrote:
> Yeah, and the other headache in IPv4 is lack of autoconfiguration: you
> need a dhcp server for two machines to talk to each other.  If we want
> to clone systems from nearby kids, this then means a dhcp server, and
> all that rot.

What about self-assigned IP4 addresses?  That's pretty standard in all 3
major OSes, and there's a well-defined process to come up with one.  You
essentially pick an address at random from the 169.xxx.xxx.xxx range,
and send out some packets to see if anyone else has it.  If somebody
does, you pick a new address and repeat.

We're already going to ship Avahi for userspace, and it can do this just
fine.  For the BIOS side of things, this should be trivial to implement
as the state machine is quite simple.

This will at least get two machines talking to each other.

Dan

> Having personally had my home network hosed when a little sipura voip
> box I had decided it would be nice to also offer addresses, this scares
> the bejezus out of me.
>                                           - Jim
> 
> 
> On Wed, 2006-10-04 at 13:21 +0200, Andreas.Trawoeger at wgkk.at wrote:
> > 
> > What's the use case for using IPv4?
> > 
> > Main reason for using IPv4 today is compatibility with existing devices.
> > But with official IPv4 adresses becoming a scarce resource you end up with
> > dozend and hundreds of 192.168.0.0, 172.16.0.0 and 10.0.0.0 networks which
> > are horrible to interconnect.
> > 
> > So one IPv6 subnet  for every child should be the logical choice to use
> > with OLPC.
> > This way every child could use his OLPC to boot a broken OLPC of another
> > child with an rescue system, without clashing with other OLPC in the area,
> > as it is common with IPv4 if somebody accidently installs it's own DHCP
> > server an hand out wrong IPs.
> > 
> > Add an IPv6 to IPv4 Gateway to the 100$ Server and you end up with a system
> > that should work quite well.
> > 
> > cu andreas
> > 
> > 
> > Christopher Blizzard <blizzard at redhat.com> schrieb am 04.10.2006 02:23:24:
> > 
> > > Any time you are unrouted, you have limited your system management
> > > options.
> > >
> > > In this case, to the local island, forcing that any software repository
> > > to also  be local.  So you've just foreclosed other options.
> > >
> > > There may be times when you have sufficient bandwidth you'd prefer to
> > > have fewer repositories....
> > >                                   - Jim
> > >
> > >
> > > On Tue, 2006-10-03 at 20:18 -0400, Christopher Blizzard wrote:
> > > > What's the real use case for having to include IPv6?  As far as I can
> > > > tell the only use case is local re-installation of operating system.
> > > >
> > > > We can certainly make assumptions about the local network.  Need to do
> > a
> > > > re-install?  Use the non-routed local IPv4 network that's supplied by
> > > > the server or another client running a special app that's once again
> > > > IPv4 based.  No need to include all that extra code in the ROM and we
> > > > save ourselves a huge amount of time.
> > > >
> > > > --Chris
> > > > _______________________________________________
> > > > Devel mailing list
> > > > Devel at laptop.org
> > > > http://mailman.laptop.org/mailman/listinfo/devel
> > > --
> > > Jim Gettys
> > > One Laptop Per Child
> > >
> > >
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> > >
> > 
> >