From: Peter Valian (valianp@southwestern.edu)
Date: Sat Sep 01 2001 - 04:25:08 CDT
Nick,
That error means that the MAC address already exists in the dhcpd.conf
file...not the leases file.
the dhcp server doesnt clear the old leases out for some reason (Ted
Lemon told me it cleans out the leases file "once in a while"). what
maybe happening is a potential bug in the way I wrote the 1.2 lease
parser. At the time I was not too concerned with having multiple
expired leases with the same IP in the leases file. I rewrote the
leases parser in 1.3 to build a hash keyed on the IP. Ted did also tell
me that the last one in the leases file is the most recent. So when the
hash gets built now, it is the last occurrence of the IP that NetReg
uses to verify MAC.
I am almost certain this is what is happening...netreg in your case is
finding the old lease and using that MAC to check against the conf file.
last call for bugs...I will release v1.3 by tuesday.
-p
Nick Ciesinski wrote:
>
> Our students are starting to register... and I noticed something very
> interesting and bad at the same time..
>
> Here is what happened.
>
> Student "A" registered just fine. Student "A"'s old non registered lease
> stayed in the dhcpd.leases file.
>
> 5 hours later Student "B" went to register, gets the same non-registered IP
> as Student "A". Student "B" puts his username/pass in and gets the message
> that the computer had already been registered... Well when I looked in the
> dhcpd.leases file Student "A"'s entry was still there, just
> expired. Student "A"'s entry happened to be first on the list so that is
> why Student "B" got the message. I then re-started the dhcp server
> manually and then Student "A"'s entry went away. But what I can't figure
> out is why it cleaned it out on that re-start. There had been over 50
> re-starts from the time Student "A" registered from Student "B".
>
> I have upgraded to rc12 in hopes that it solves this, but I am not holding
> my breath. I think that in the register.cgi we may need to check to see if
> the lease has expired.
>
> Am I correct on thinking that this should not be happening with the
> dhcpd.lease file???
>
> Thanks,
>
> Nick Ciesinski
>
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