dhclient does not reliably exit when the device disappears

[Andrew Pollock]

Hi DHCP hackers.

I recently received this bug report, which I'm forwarding on for
discussion/consideration.

regards

Andrew

On Fri, Feb 17, 2006 at 11:34:53AM +0100, martin f krafft wrote:
> Package: dhcp3-client
> Version: 3.0.3-6
> Severity: normal
> 
> If I remove a network device under control of dhclient (e.g. a wifi
> adapter that supports being turned off by ACPI), dhclient will
> complain but it will not die. As I move around a lot and turn wifi
> on and off as needed, I end up with dozens of dhclient processes for
> the wifi device, which tend to like to get into each others way.
> 
> I think it would make sense for dhclient to exit when its device
> disappears.
> 
> lapse:/etc/ifplugd/action.d# dhclient wifi
> Internet Systems Consortium DHCP Client V3.0.3
> Copyright 2004-2005 Internet Systems Consortium.
> All rights reserved.
> For info, please visit http://www.isc.org/products/DHCP
> 
> Listening on LPF/wifi/00:14:a4:04:ea:dc
> Sending on   LPF/wifi/00:14:a4:04:ea:dc
> Sending on   Socket/fallback
> DHCPDISCOVER on wifi to 255.255.255.255 port 67 interval 7
> *** i turned the device off here ***
> receive_packet failed on wifi: Network is down
> DHCPDISCOVER on wifi to 255.255.255.255 port 67 interval 9
> send_packet: No such device
> DHCPDISCOVER on wifi to 255.255.255.255 port 67 interval 11
> send_packet: No such device
> DHCPDISCOVER on wifi to 255.255.255.255 port 67 interval 11
> send_packet: No such device
> DHCPDISCOVER on wifi to 255.255.255.255 port 67 interval 11
> send_packet: No such device
> DHCPDISCOVER on wifi to 255.255.255.255 port 67 interval 12
> send_packet: No such device
> No DHCPOFFERS received.
> No working leases in persistent database - sleeping.
> lapse:/etc/ifplugd/action.d# ps aux | grep [d]hc
> root     23599  0.0  0.0   2164   508 ?        Ss   11:31   0:00 dhclient wifi
> 
> -- System Information:
> Debian Release: testing/unstable
>   APT prefers stable
>   APT policy: (700, 'stable'), (600, 'testing'), (98, 'unstable'), (1, 'experimental')
> Architecture: i386 (i686)
> Shell:  /bin/sh linked to /bin/bash
> Kernel: Linux 2.6.15-1-686
> Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
> 
> Versions of packages dhcp3-client depends on:
> ii  debianutils                   2.15.2     Miscellaneous utilities specific t
> ii  dhcp3-common                  3.0.3-6    Common files used by all the dhcp3
> ii  libc6                         2.3.5-13   GNU C Library: Shared libraries an
> 
> dhcp3-client recommends no packages.
> 
> -- no debconf information
> 
> -- 
>  .''`.     martin f. krafft <madduck at debian.org>
> : :'  :    proud Debian developer and author: http://debiansystem.info
> `. `'`
>   `-  Debian - when you have better things to do than fixing a system
>  
> Invalid/expired PGP (sub)keys? Use subkeys.pgp.net as keyserver!
>  
> in seattle, washington, it is illegal to carry a concealed weapon that
> is over six feet in length.