[Dnsmasq-discuss] dnsmasq giving new addresses despite of leases file

[Leonardo Rodrigues]

Em 08/03/2010 12:20, Simon Kelley escreveu:
>
>>      shouldnt dnsmasq provide the IP present on its lease file, given the
>> fact that lease was still valid ???
>>
>>      
> Good question: I can give you a partial answer, the lease gets deleted
> as part of the response to the first DHCPREQUEST. Here's the code in
> question.
>
>                  {
>                    message = _("wrong address");
>                    /* avoid loops when client brain-dead */
>                    lease_prune(lease, now);
>                    lease = NULL;
>                  }
>
> What I can't answer is what the "brain-dead" behaviour is/was that's
> getting countered here. The "lease prune" call was added in version
> 2.41, but there's no explanation in the changelog :-(  and I can't
> remember why it was added.
>
> I suspect that some client somewhere kept trying with the wrong address
> instead of falling back to a DHCPDISCOVER.
>
>    


     Hi Simon,

     I've checked logs and found no other 'wrong address' cases than 
this one. In fact all machines on this network are desktops and this one 
which is giving the problem is the only notebook on the network.

     anyway, do you think enabling the '--log-dhcp' option can provide 
some useful information ? Is there any way of getting debug logging 
enabled AND going to background ? I've found the debug options, but 
seems all of them keep process in the foreground, which unfortunelly is 
not possible to me, as this is a small device running OpenWRT, i have no 
monitor/keyboard attached to this machine.

     anyway, do you think debug modes could provide some useful 
information ?

-- 


	Atenciosamente / Sincerily,
	Leonardo Rodrigues
	Solutti Tecnologia
	http://www.solutti.com.br

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