Re: 2.6.8.1: ip auto-config accepts wrong packages

[Frank Steiner]

Hi Mark,

Mark Broadbent wrote:

> Stupid question but the MAC addresses on the cards are different aren't
> they?  Could you also double check that the xid values differ on both
> machines, this is shown on the line:
>
> IP-Config: eth0 UP (able=1, xid=07196018)
>                                 ^^^^^^^^
>
> Both MAC and xid should be different.

obiously, the problem is here. The xid is the same on 5 different hosts
I tested with the debugging-enabled kernel. Looking it ipconfig.c I now
understand that with several hosts using the same xid it must go wrong.
I'm currently compiling a new kernel with debugging enabled in rancom.c
to see what's going wrong here. Looks like random_bytes is returning
the same value on all hosts :-(

Can anyone else maybe do a quick check with "ip=dhcp" on two hosts
just to see if the problem with the identical xids just show up here?

I will send the result of the debugging output from random.c.

cu,
Frank

--
Dipl.-Inform. Frank Steiner   Web:  http://www.bio.ifi.lmu.de/~steiner/
Lehrstuhl f. Bioinformatik    Mail: http://www.bio.ifi.lmu.de/~steiner/m/
LMU, Amalienstr. 17           Phone: +49 89 2180-4049
80333 Muenchen, Germany       Fax:   +49 89 2180-99-4049

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